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Flat Holm
Flat Holm
(Welsh: Ynys Echni) is a limestone island lying in the Bristol Channel
Bristol Channel
approximately 6 km (4 mi) from Lavernock Point in the Vale of Glamorgan. It includes the most southerly point of Wales. The island has a long history of occupation, dating at least from Anglo-Saxon
Anglo-Saxon
and Viking
Viking
age. Religious uses include visits by disciples of Saint Cadoc
Saint Cadoc
in the 6th century, and in 1835 it was the site of the foundation of the Bristol Channel
Bristol Channel
Mission, which later became the Mission to Seafarers. A sanatorium for cholera patients was built in 1896 as the isolation hospital for the port of Cardiff. Guglielmo Marconi transmitted the first wireless signals over open sea from Flat Holm to Lavernock. Because of frequent shipwrecks a lighthouse was built on the island, which was replaced by a Trinity House
Trinity House
lighthouse in 1737. Because of its strategic position on the approaches to Bristol
Bristol
and Cardiff
Cardiff
a series of gun emplacements, known as Flat Holm Battery, were built in the 1860s as part of a line of defences, known as Palmerston Forts. On the outbreak of World War II, the island was rearmed. It forms part of the City and County of Cardiff
Cardiff
and is now managed by Cardiff
Cardiff
Council's Flat Holm
Flat Holm
Project Team and designated as a Local Nature Reserve, Site of Special Scientific Interest
Site of Special Scientific Interest
and a Special Protection Area, because of the maritime grassland and rare plants such as rock sea-lavender (Limonium binervosum) and wild leek (Allium ampeloprasum). The island also has significant breeding colonies of lesser black-backed gulls (Larus fuscus), herring gulls (Larus argentatus) and great black-backed gulls (Larus marinus). It is also home to slowworms (Anguis fragilis) with larger than usual blue markings.

Contents

1 History

1.1 Bronze Age
Bronze Age
and Early Christian 1.2 Anglo-Saxon
Anglo-Saxon
and medieval 1.3 18th century – smuggling 1.4 19th century – Seafarer's Mission and Marconi

2 Shipwrecks 3 Geography 4 Geology 5 Buildings

5.1 Lighthouse
Lighthouse
and foghorn station 5.2 Farm House 5.3 Batteries and barracks 5.4 Radar
Radar
station 5.5 Isolation hospital

6 Flat Holm
Flat Holm
Project 7 Flora and fauna 8 Sustainability 9 Severn Barrage
Severn Barrage
study 10 In popular culture 11 See also 12 References 13 Further reading 14 External links

History[edit] Bronze Age
Bronze Age
and Early Christian[edit] The first traces of human habitation of the island are from the late Bronze
Bronze
Age, 900 to 700 BC, known as the Ewart Park Phase. A bronze axe head was discovered on the island in 1988, between the island's modern lone farmhouse and West Beach, at grid reference ST21986498.[1] In the sub-Roman period of the 6th century AD, it became a retreat for Saint Cadoc, who lived on the island as a hermit for seven years.[2] His friend, Saint Gildas
Gildas
lived at the same time on nearby Steep Holm, and the two sometimes met up for prayers. Gildas
Gildas
left the island to become Abbot of Glastonbury.[3]

Part of a medieval grave slab 42 cm (17 in) by 26 cm (10 in) and 11 cm (4 in) thick, now in the National Museum of Wales[4]

In June 1815, a Dr Thomas Turner visited Flat Holm
Flat Holm
in a small boat and was stranded for a week due to high winds. He discovered two Christian graves located close together in a field 23 m (75 ft) northeast of the island's present farmhouse; one grave had been opened and contained a male skeleton.[5] The open grave's headstone was made of purbeck marble and engraved with a Celtic cross, but had since broken in two.[6] A second disturbed grave, also marked with a headstone, was found to the southeast and contained a coffin constructed with iron bolts. Inside the coffin were two skeletons which had been doused in lime, indicating that the occupants had probably died from a contagious disease.[7] Anglo-Saxon
Anglo-Saxon
and medieval[edit] Anglo-Saxons
Anglo-Saxons
called the island Bradanreolice. Reolice derives from an Irish word meaning churchyard or graveyard, alluding to the belief that the island had religious significance as a place of burial to people at the time.[1] However, the island's current name of "Holm" comes from the Old Norse
Old Norse
meaning "island in an estuary".[8] Records indicate that a Viking
Viking
fleet from the south of Brittany
Brittany
led by two earls, Ottir (Oter) and Hroald (possibly Ottir's king Ragnall), took refuge on the island following their defeat by the Saxons
Saxons
at Watchet.[1][9] The Anglo-Saxon
Anglo-Saxon
Chronicle records that in 1067, Gytha Thorkelsdóttir, mother of Harold II, the last Anglo-Saxon
Anglo-Saxon
king of England, stayed on the island before travelling to St Omer in France after the Norman conquest of England.[10] After the invasion, Lord Robert Fitzhamon, a cousin of William the Conqueror, formed the Shire of Glamorgan
Glamorgan
in Wales
Wales
proper, with Cardiff
Cardiff
Castle at the centre of his new domain. Flat Holm
Flat Holm
came within the parish boundary of St Mary's, one of Cardiff's two parish churches, and was kept as a hereditary property of the Norman Lords of Glamorgan.[11] A survey by archaeologist Howard Thomas in 1979 unearthed a number of medieval potsherds in the vicinity of the farmhouse and found evidence of continuous occupation of the island including middens containing numerous animal bones along with oyster and cockle shells.[12] Fragments of green glazed jugs and flagons from the late 12th to 13th century and shards of pottery from the 14th century were also found on the island. The presence of Pennant sandstone roofing tiles and a fragment of a 14th-century glazed ridge tile indicate the existence of a substantial medieval building, possibly a chapel, demolished when the present farmhouse was constructed. Property records from 1542 show that King Henry VIII
Henry VIII
granted a lease to farm the island to a gentleman by the name of Edmund Tournor. His family remained on Flat Holm
Flat Holm
until the end of the 17th century when the lease passed to Joseph Robins.[9] 18th century – smuggling[edit]

Cave and mineshaft in the east cliffs of Flat Holm

During the 18th century, the island's location made it an ideal base for smuggling. It has been alleged that an old mine shaft on the north side of the island connects with a series of natural tunnels, and a concealed exit to the sea.[13] Although Flat Holm
Flat Holm
was in full view of both the Welsh and English coasts, customs authorities were powerless to act as they had no boat to take them to the island. According to tradition, a small cave in the east cliff at Flat Holm
Flat Holm
was used for the storage of contraband, mainly tea and brandy.[14] 19th century – Seafarer's Mission and Marconi[edit]

Post Office Engineers inspect Marconi's equipment on Flat Holm, May 1897

In 1835, clergyman John Ashley from Clevedon, England
England
voluntarily ministered to the population of the island. Ashley created the Bristol Channel Mission in order to serve seafarers on the 400 sailing vessels which used the Bristol
Bristol
Channel. The mission would later become the Mission to Seafarers, which still provides ministerial services to sailors in over 300 ports.[15] A service is held annually to bless the island. On 13 May 1897, a 22-year-old Italian inventor named Guglielmo Marconi, assisted by a Cardiff
Cardiff
Post Office engineer named George Kemp, transmitted the first wireless signals over open sea from Flat Holm
Flat Holm
to Lavernock Point
Lavernock Point
near Penarth, Wales.[16] Having failed to interest the Italian government in his project, Marconi brought his telegraphy system to Britain. Here he met Welshman William Preece
William Preece
who was at that time Chief Engineer of the General Post Office
General Post Office
and a major figure in the field. Marconi and Preece erected a 34 m (112 ft) high transmitting mast on Flat Holm
Flat Holm
as well as a 30 m (98 ft) receiving mast at Lavernock
Lavernock
Point. The first trials on 11 May and 12 failed. On 13 May, the mast at Lavernock
Lavernock
was raised to 50 m (160 ft) and the signals were received clearly. The message sent by Morse Code
Morse Code
was "Are you ready"; the original paper Morse slip, signed by both Marconi and Kemp, is now in the National Museum of Wales.[16] The island made communication history again on 8 October 2002, by becoming one of the first areas of South Wales
Wales
to link to the Internet through a wireless connection deployed by Cardiff
Cardiff
Council as part of the Flat Holm
Flat Holm
Project. The connection is used for Internet, access to Cardiff
Cardiff
Council's data network and VOIP telephony. There are two handsets in the main farmhouse that are part of the councils own PBX thus having Cardiff
Cardiff
dialling codes. 105 years after Marconi, Spencer Pearson an IT Consultant with Cardiff
Cardiff
Council made the first telephone call from the island to his office at County Hall, Atlantic Wharf, Cardiff.[17] Shipwrecks[edit] The treacherous conditions for ships around the island led to several shipwrecks. The British passenger vessel Tapley lost seven passengers when it became stranded on Flat Holm
Flat Holm
in January 1773 on its passage from Cork, Ireland to Bristol.[18] On 23 October 1817, a British sloop, William and Mary, foundered after hitting the rock islands near Flat Holm
Flat Holm
known as The Wolves (Bristol Channel). The ship was en route from Bristol
Bristol
to Waterford
Waterford
and sank within fifteen minutes. The Mate, John Outridge, and two sailors made off in the only lifeboat. Fifteen survivors were later rescued, having clung to the ship's rigging,[19] but fifty-four other passengers were lost.[20][21] Fifty of the bodies were recovered from the ship and were buried on Flat Holm.[22] In 1938, the steamship Norman Queen ran ashore on Flat Holm
Flat Holm
but was refloated,[22] and in 1941 the steamship Middlesex was lost.[23] Geography[edit]

Map showing location in southwestern United Kingdom

Flat Holm
Flat Holm
(Welsh: Ynys Echni) is located in the Bristol
Bristol
Channel. It is a small, almost circular, limestone island, approximately 620 m (2,030 ft) in diameter, covering 35 ha (86 acres). It rises in a gentle slope from the exposed western rocky shore to more sheltered easterly cliffs, at the top of which stands the prominent lighthouse. At its highest point it is 32 m (105 ft) above sea level. Flat Holm
Flat Holm
is considered to be part of Wales, whereas the nearby island of Steep Holm
Steep Holm
(Welsh: Ynys Rhonech) is considered part of England. About 1.3 km (0.81 mi) northwest of Flat Holm are two very small islands collectively known as The Wolves, measuring approximately 25 m (82 ft) by 20 m (66 ft). The tidal range in the Bristol Channel
Bristol Channel
is 15 m (49 ft);[24] second only to Bay of Fundy
Bay of Fundy
in Eastern Canada.[25][26] Geology[edit]

Flat Holm
Flat Holm
geology

During much of the most recent ice ages, from 1.8 million years ago, the sea level in the Severn Estuary
Severn Estuary
was some 50 m (160 ft) below the current level and Flat Holm
Flat Holm
was joined to the Somerset coast as an extremity of the Mendip Hills.[27] Sometime since the start of the Mesolithic
Mesolithic
period, 15,000 years ago, the ice sheets retreated, and the flat plains surrounding the river estuary flooded; the hilltops of Mendip Hills
Mendip Hills
became the islands of Flat Holm
Flat Holm
and Steep Holm.[28][29] The Carboniferous Limestone
Carboniferous Limestone
of which Flat Holm
Flat Holm
and neighbouring Steep Holm are composed forms a part of a wider Mesozoic
Mesozoic
basin extending from the Bristol
Bristol
and Mendip area westwards beneath the mouth of the Severn to South Wales, outcropping to the west at Sully Island
Sully Island
and Barry, Wales. Part of the island is designated a Geological Conservation Review (GCR) Site and is a recognised Site of Special Scientific Interest (SSSI).[30] The GCR and SSSI interest lies along the south-western shoreline from the north west point to Lighthouse Point where a wave cut portion of the limestone displays large fossil "ripple marks".[31] There are argentiferous (i.e. silver-bearing) galena deposits on Flat Holm; the pits and mounds visible on the surface of the island are a result of trial borings. A dispute over lead mining rights in the 1780s ended with John Stuart, Lord Mount Stuart
John Stuart, Lord Mount Stuart
making an official complaint that the lighthouse keeper was using the coals intended for the lighthouse for processing lead.[32] Mining for lead was not profitable, however, and the works were abandoned.[14] Red marl from the Triassic
Triassic
Period fills joints in the Carboniferous Limestone showing evidence of karstic (cave forming) processes during this period. Caves on the western and north-eastern sides of the island were used during the years of smuggling.[1] Buildings[edit] Lighthouse
Lighthouse
and foghorn station[edit]

Flat Holm
Flat Holm
Lighthouse Ynys Echni

Flat Holm
Flat Holm
an almost entirely solar powered lighthouse.

Wales

Location Flat Holm Bristol
Bristol
Channel Wales United Kingdom

Coordinates 51°22′32″N 3°07′06″W / 51.375641°N 3.118455°W / 51.375641; -3.118455

Year first constructed 1737

Automated 1988

Construction stone tower

Tower shape tapered cylindrical tower with balcony and lantern

Markings / pattern white tower and lantern

Height 30 metres (98 ft)

Focal height 50 metres (160 ft)

Current lens 1st order (920mm) catadioptric fixed

Light source solar power

Intensity 17,100 candela

Range 15 nautical miles (28 km; 17 mi)

Characteristic Fl (3) WR 10s.

Admiralty number A5426

NGA number 5860

ARLHS number WAL-006

Managing agent

Trinity House[33] [34]

Heritage Grade II listed building
Grade II listed building

[edit on Wikidata]

Flat Holm
Flat Holm
Lighthouse

Flat Holm
Flat Holm
Lighthouse
Lighthouse
is 30 m (98 ft) high and 50 m (160 ft) above mean high water. It has a 100 watt lamp that flashes three times every ten seconds, and is red from 106° to 140°; white to 151°; red to 203°; white to 106°. White light visibility up to 18 nmi, this data as recorded in 1965 in Reed's Nautical Almanac but Trinity House
Trinity House
now note visibility as 15 nmi for the white light and 12 nmi for the red light. 28 and 22 km (15 and 12 nmi).[35] The first light on the island was a simple brazier mounted on a wooden frame, which stood on the high eastern part of the island.[9] In 1733 the Society of Merchant Venturers
Society of Merchant Venturers
of Bristol
Bristol
found the brazier to be unreliable and petitioned the General Lighthouse
Lighthouse
Authority, Trinity House, for an actual lighthouse, but the petition failed.[35] In 1735 Mr. William Crispe of Bristol
Bristol
submitted a proposal to build a lighthouse at his own expense. This initial proposal also failed but negotiations resumed in 1736 when 60 soldiers drowned after their vessel crashed on the Wolves rocks near Flat Holm. Following this disaster, the Society of Merchant Venturers
Society of Merchant Venturers
finally supported William Crispe's proposal.[14] Crispe agreed to pay £800 (£110,552, $220,241 in 2008) for the construction of the tower as well as the fees permits.[9] The construction of the tower finished in 1737 and it began operating on 25 March 1738.[36]

Foghorn
Foghorn
building

The lighthouse was struck by lightning in a severe storm on 22 December 1790. The keeper narrowly escaped but the top of the tower was severely damaged. A 10 ft (3.0 m) tall crack on the side had to be repaired as did the oak beams supporting the top platform.[14] In 1819, the circular stone tower was updated to house a more powerful lantern; the tower was raised from 21 m (69 ft) to 27 m (89 ft). A clockwork mechanism to rotate the light was installed in 1881.[9] Flat Holm
Flat Holm
Lighthouse
Lighthouse
was the last signal station in the country in private ownership. In July 1822, Trinity House
Trinity House
finally bought the lease for £15,838.10 (£1.2 million, $2.4 million in 2008).[9] Two years later a fountain oil lamp was installed and the lantern was raised by another 1.5 m (4.9 ft). In 1867 a lantern 4 m (13 ft) in diameter was installed.[35] The lighthouse was renovated in 1929 to include accommodations for up to four keepers. This lasted until 1988, when the lighthouse became fully automated and the keepers were withdrawn. In 1997, the light was modernised and converted to solar power. It is now monitored and controlled by the Trinity House
Trinity House
Operations Control Centre at Harwich, in Essex.[37] Built by Trinity House
Trinity House
in 1906, the foghorn building is a Grade II listed building.[38] The siren was originally powered by a 15 hp (11 kW) engine, which gave two blasts in quick succession at two-minute intervals that could be clearly heard by people living on both coasts but for many years following World War II, the foghorn was heard as one long and one short blast and nautical almanac data as at 1965, stated that the interval was 1.5minutes.[39] Volunteers from the Flat Holm
Flat Holm
Society, with help from the Prince's Trust, restored the horn and engines in the 1960s. The Foghorn
Foghorn
Station was officially reopened by the Welsh Secretary and the Welsh Assembly First Secretary in May 2000 when the foghorn was sounded for the first time since 1988.[38] Farm House[edit]

Flat Holm
Flat Holm
Farm House

Records show that monks from St Augustine's Abbey in Bristol established a dairy farm and grange on the island after Flat Holm
Flat Holm
was granted to them by Robert, Earl of Gloucester in 1150.[40] Dr Thomas Turner, who was stranded on Flat Holm
Flat Holm
during a visit in 1815, passed the time by exploring the island. He noted that the tax-exempt abbey farm was prospering and counted "seven cows, two bulls, five sheep, one horse, two pigs and two dogs".[5] In 1897 the farmhouse was converted into The Flat Holm
Flat Holm
Hotel, and a bar and skittle alley were added, but the hotel closed after a few years.[9] The farmhouse has been renovated by the Flat Holm
Flat Holm
Project and is now used as accommodation for visitors staying on the island. Batteries and barracks[edit]

Moncrieff 'disappearing gun'

Flat Holm
Flat Holm
was fortified in the 1860s following a visit by Queen Victoria and Prince Albert to France, where they had been concerned by the strength of the French Navy. The Royal Commission on the Defence of the United Kingdom, under direction of Lord Palmerston, recommended fortification of the coast in 1865. The defences on the island, which became part of a line of defences known as the Palmerston Forts, were completed in 1869.[9] Flat Holm
Flat Holm
Battery is a series of gun emplacements on Flat Holm
Flat Holm
built to protect Bristol
Bristol
and Cardiff
Cardiff
across the channel. There are remains of four battery sites on the island:[41]

* Castle Rock Battery: three guns in two Moncrieff pits and one open-backed pit[42]

Farm House Battery: two guns in one full Moncrieff pit and one open-backed pit[42] Well Battery: one gun in an open-backed Moncrieff pit. The gun was removed by Army Apprentices in 1964.[43] Lighthouse
Lighthouse
Battery: three guns in two full Moncrieff pits and one open-backed pit[42]

Flat Holm
Flat Holm
Battery sites

These four emplacements run from the northern to the southern point of the island, along the western coast. Nine Rifled muzzle loaders (RMLs) on disappearing Moncrieff carriages were built at the Royal Gun Foundry, Woolwich. They were mounted in four separate batteries, all in Moncrieff pits, 2 m (7 ft) in diameter and 3 m (10 ft) deep, constructed of limestone blocks and bricks. These pits had the advantage of being almost invisible to shipping and also offered protection to the gun crews. The RML 7-inch 7 ton guns were too heavy for mobile land service. They consisted of a steel rifle tube surrounded by wrought iron coils, and cascabel, with an overall length of each gun is 361 centimetres (142 in). They used a 52.3 kg (115 lb) Palliser shell and were mounted on the Moncrieff disappearing carriage.[41] The guns were never needed and were fired only for test purposes.[9]

Canon and Moncrieff Pit near the lighthouse

In 1869, stone barracks were built to sleep up to 50 men.[44] However, the 1881 Census for Flat Holm
Flat Holm
shows that the barracks were occupied only by the Master Gunner, Thomas Barrett, his family, and five soldiers. Barrett's son, Albert, was born on the island on 31 December 1881.[45] The men were stationed on the island to keep the guns in good working order but the garrison would have been reinforced by regular artillery and volunteer troops if ever an invasion had been imminent.[43] The barracks for the battery were located near the southernmost battery emplacement. Other fortifications included a large drainage basin, underground storage tank, an administrative building and a secure store. A "ditch-and-bank" system served to protect the Lighthouse
Lighthouse
Battery from cross-island attack. The barracks were vacated in 1901 and the buildings have now been restored by the Flat Holm
Flat Holm
Project for educational use.[43] Radar
Radar
station[edit] At the outbreak of World War II
World War II
over 350 soldiers of the Royal Artillery were stationed on the island.[9] Flat Holm
Flat Holm
was re-armed with four 4.5-inch guns and associated searchlights for anti-aircraft and close defence, together with two 40mm Bofors guns.[41] A GL (Gun Laying) Mk II radar station was also placed in the centre of the island.[9][46] The structures formed part of the Fixed Defences, and protected the Atlantic shipping convoys between Cardiff, Barry, and Flat Holm.[47] These works were abandoned after the war and the island has had no military use since. Flat Holm's helipad still remains, however, at the centre of the island. Isolation hospital[edit]

Flat Holm
Flat Holm
Cholera
Cholera
Hospital ruins

In July 1883, the steamship Rishanglys left three seamen on the island who were believed to be suffering from cholera, one of whom subsequently died.[48] The only accommodation was a canvas tent, and the regular inhabitants of the island petitioned Cardiff
Cardiff
council for compensation, complaining of loss of income from visitors and difficulty in selling vegetables grown on their farm at the market in Cardiff.[49] In 1896, the Marquis of Bute, then-owner of Flat Holm, agreed to lease all the land that was not already in use by the military or the lighthouse to the Cardiff
Cardiff
Corporation for £50 per year. The corporation then built a permanent sanatorium on the land for use by cholera patients.[9] The building was described in The Lancet as a "pavilion" comprising two six-bed wards and a nurse's room.[48] In 1893, three more sailors arrived in Cardiff
Cardiff
from Marseilles
Marseilles
on the SS Blue Jacket and were suspected of having cholera. The first engineer, Thomas Smith, and able seaman Robert Doran, were deported to the isolation hospital on Flat Holm
Flat Holm
to prevent spread of the disease. The second mate, P. J. Morris, was also sent to the island as a precautionary measure, but quickly recovered.[50] The Flat Holm sanatorium is unique in being the only Victorian isolation hospital sited on a British offshore island.[51] The last patient to die in the hospital, a victim of bubonic plague, was cremated on the island at the end of the 19th century. The hospital finally closed in 1935 and has remained derelict since.[52][53] Both the hospital main block and laundry block are Grade II listed buildings and are considered to be "at risk".[54] Flat Holm
Flat Holm
Project[edit] In 1975, the South Glamorgan
Glamorgan
County Council leased the island for the next 99 years.[9] In March 1995, the county council agreed to obtain Flat Holm
Flat Holm
through a 50-year lease from the Crown Estate starting on 12 December 1995.[55] Flat Holm
Flat Holm
is now designated as a Local Nature Reserve, as stipulated in that lease. It is managed by the Cardiff Council as The Flat Holm
Flat Holm
Project.[56] The project team operates the Lewis Alexander, a boat which was purpose-built for the crossing to Flat Holm
Flat Holm
and which is able to carry up to 45 passengers and essential supplies to the island. The work of the Flat Holm
Flat Holm
Project is supported by the registered charity the Flat Holm
Flat Holm
Society.[57] Flora and fauna[edit] Flat Holm
Flat Holm
was designated a Site of Special Scientific Interest
Site of Special Scientific Interest
(SSSI) in 1972. The designation covers the maritime grassland which is mainly concentrated around the edges of the island.[52]

Rock sea-lavender

There are no endemic plant species but the relative isolation of the island has allowed a number of hardy species such as bird's-foot trefoil (Lotus corniculatus) and biting stonecrop (Sedum acre) to thrive. There are also a number of relatively rare plants, such as rock sea-lavender (Limonium binervosum), and wild leek (Allium ampeloprasum). The leek grows to 6 ft (1.8 m) and Flat Holm is one of only five places in the UK where it is found.[52] Related to the onion, the leek has a bulb that grows for several years producing only leaves, then blooms with large purple flowers that smell of garlic. After flowering the bulb dies and produces up to 150 bulblets. Others plants may have been introduced by the Augustinian
Augustinian
Community for their medicinal uses.[58] These include dove's-foot crane's-bill Geranium molle, an anodyne plant claimed by Nicholas Culpeper
Nicholas Culpeper
to have a wide range of medicinal uses and an "excellent good cure for those that have inward wounds, hurts, or bruises, both to stay the bleeding, to dissolve and expel the congealed blood, and to heal the parts, as also to cleanse and heal outward sores, ulcers and fistulas".[59] The wild peony (Paeonia mascula) was introduced to the island (and nearby Steep Holm), possibly by monks,[60] and has naturalised. Thirty-seven plants were taken to the island from Steep Holm
Steep Holm
by Frank Harris, the farmer at the time, in the 1930s, many of which died during the World War II occupation and fortification of the island. One remaining plant was reintroduced by David Worall, the Flat Holm
Flat Holm
Warden, in 1982 and is protected by fencing near the path to the lighthouse. A few plants grown from seed also survive in the island's farmhouse garden.[61]

Slowworm

The island has a significant breeding colony of over 4,000 pairs of lesser black-backed gulls (Larus fuscus), 400 pairs of herring gulls (Larus argentatus), 2 pairs of great black-backed gulls (Larus marinus) and varying numbers of common shelduck (Tadorna tadorna) and Eurasian oystercatchers (Haematopodidae). The feeding habits of lesser black-backed gulls were studied in 1989, and it was shown that smaller clutches were laid than in previous years and that supplementary feeding did not increase egg or clutch size.[62][63] The island is also home to slowworms (Anguis fragilis). Flat Holm's slow-worm population has unusually large blue markings. The island's rabbit population, introduced for farming in the 12th century,[9] suffers from myxomatosis, which effectively contains the numbers. The island has been grazed since 1989, initially by goats, but also by sheep since 1992. In 1997 Soay sheep
Soay sheep
were introduced and as of 2008 there are 28 sheep grazing wild on the island.[64] Sustainability[edit]

PV array at Flat Holm

The Flat Holm
Flat Holm
project aims to develop the island as a showcase of sustainable technologies. The original power supply consisted of several diesel generators at different properties and unconnected to each other. In 2006, underground cables were installed to form a ‘mini-grid’ between the farmhouse, workshops and the fog horn keeper's cottage. This was powered with a (13.5 kW) inverter/charger system located at the farmhouse with the farmhouse diesel generator as back-up. In 2007 the system was extended to include a battery bank charged by two photovoltaic solar arrays, and by a 6 kW wind turbine sited at a redundant telecommunications tower on the high point of the island.[65] Severn Barrage
Severn Barrage
study[edit] If a Severn Barrage
Severn Barrage
were ever to be constructed it could have consequences for Flat Holm, depending on the design and the route. A number of studies have been proposed, the latest being when John Hutton, Secretary of State for Business, Enterprise and Regulatory Reform, announced a further feasibility study on 25 September 2007 to follow on the report by the Sustainable Development Commission. The proposal for a hydro-electric barrier to generate 8.6 GW and meet five percent of Britain's power needs, is being opposed by some environmental groups.[66][67] This proposed barrage would pass two miles (3 km) west of Flat Holm.[68] The study is expected to last at least two years and will be split into two stages with a decision point at the end of each. The first, which is likely to run until late 2008, will focus on high-level issues and reach an initial view on whether there are any fundamental issues that would preclude a tidal scheme in the Severn Estuary. Subject to the decision at the end of the first phase, the second phase will look at the issues in more detail and culminate in a full public consultation in early 2010.[69] In popular culture[edit]

In 1979 the BBC's Let's Look at Wales
Wales
presented by David Parry-Jones featured The Bristol Channel
Bristol Channel
and included the island.[70] The BBC's Countryfile
Countryfile
programme broadcast on 17 February 2008 featured Flat Holm
Flat Holm
and the possibility of a Severn Barrage.[71] In the BBC
BBC
TV series Torchwood, the March 2008 episode "Adrift" featured the island as home to a secret medical facility.[72] In BBC's Not in My Nature broadcast by BBC
BBC
One Wales
Wales
on 23 June 2008, presenter Iolo Williams
Iolo Williams
visited Flat Holm.[73]

See also[edit]

Wales
Wales
portal Lighthouses portal

List of lighthouses in Wales

References[edit]

^ a b c d Flat Holm
Flat Holm
Island. Cardiff
Cardiff
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Further reading[edit]

Jory, Bob (1995). Flat Holm. Wincanton Press. ISBN 0-948699-50-7.  Saunders, A.; Spurgeon, C.J.; Thomas, H.J.; Roberts, D.J. (2001). Guns Across The Severn: The Victorian Fortifications of Glamorgan. Aberystwyth: Royal Commission on the Ancient and Historical Monuments of Wales. pp. 18–34. ISBN 1-871184-25-8. 

External links[edit]

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