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London
London
is the largest urban area and capital city of the United Kingdom. It islocated in southeastern Great Britain. The London
London
region covers an area of 1,579 square kilometres (610 sq mi), and had a population of 7,172,036 in 2001 and a population density of 4,542 people per square kilometre. A larger area, referred to as the London
London
Metropolitan Region or the London
London
Metropolitan Agglomeration covers an area of 8,382 square kilometres (3,236 sq mi), and had a population of 12,653,500 and a population density of 1,510 people per square kilometre.[1] London
London
is a port on the Thames
Thames
(see main article Port
Port
of London), a navigable river. The river has had a major influence on the development of the city. London
London
began on the Thames' north bank and for a long time the main focus of the city remained on the north side of the Thames. For many centuries London
London
Bridge was the only bridge in or close to the city. When more bridges were built in the 18th century, the city expanded in all directions as the mostly flat or gently rolling countryside presented no obstacle to growth.

Contents

1 360 degree panorama 2 Rivers and canals

2.1 River Thames 2.2 Left bank tributaries 2.3 Right-bank tributaries 2.4 Canals

2.4.1 North of the Thames 2.4.2 South of the Thames

2.5 Islands in the Thames

3 Topography

3.1 The hills in the city of London 3.2 North London

4 Climate 5 See also 6 References

360 degree panorama[edit]

A panorama of modern London, taken from the Golden Gallery of Saint Paul's Cathedral

Rivers and canals[edit] River Thames[edit] The River Thames
Thames
is the main river of London, flowing west to east across the London
London
Basin. The river cuts into the London
London
basin through the Goring Gap, draining parts of the Cotswolds
Cotswolds
and Vale of Aylesbury to the west. Similarly tributaries such as the Mole cut through the North Downs
North Downs
into the basin from the south. Further downstream the flow of the Thames
Thames
is boosted by springs which open onto the chalky riverbed. The Thames
Thames
was once a much broader, shallower river than it is today. It has been extensively embanked. The Thames
Thames
is tidal (the Tideway) up to Teddington Lock, and London
London
is vulnerable to flooding by storm surges. The threat has increased over time due to a slow but continuous rise in high water level, caused by both the slow 'tilting' of Britain (up in the north and down in the south) caused by post-glacial rebound and the gradual rise in sea levels due to climate change. The Thames
Thames
Barrier was constructed across the Thames
Thames
at Woolwich
Woolwich
in the 1970s to deal with this threat, but in early 2005 it was suggested that a ten mile long barrier further downstream might be required to deal with the flood risk in the future.[2] Within London
London
a considerable number of rivers and streams flow into the Thames, some large enough to have exerted a significant influence on the geography of the area. Many of the smaller London
London
tributaries now flow underground. Left bank tributaries[edit] Larger left bank tributaries include the Colne, Crane, Brent, Lea (tidal reach known as 'Bow Creek'), Roding (tidal reach known as 'Barking Creek'), Rom (lower reaches known as the Beam) and Ingrebourne. There are many smaller, now often largely subterranean streams including Stamford Brook, Counter's Creek
Counter's Creek
(also known as 'Chelsea Creek'), Westbourne, Tyburn, Tyburn Brook, Fleet and Walbrook. Some of the tributaries are themselves large enough to have named tributary streams, for example the Moselle, Salmons Brook
Salmons Brook
and Pymmes Brook
Pymmes Brook
that feed the Lea, and the Silk Stream
Silk Stream
and Dollis Brook that feed the Brent. Larger rivers such as the Lea have influenced local geography in several ways. Firstly a river and its marshland formed a significant barrier to east-west movement - the Lea formed a natural boundary between the historic areas of Middlesex
Middlesex
and Essex. Secondly the valley of the Lea formed a route - both the river and later Lee Navigation, and roads including the Roman Ermine Street, the Hertford Road (A1010) and the later Great Cambridge Road
Great Cambridge Road
(A10) and A1055. The Lea Valley is also followed by two routes of what became the Great Eastern Railway and had important marshalling yards and locomotive works at Temple Mills. Thirdly the river provided power for numerous water mills - well known examples being the Royal Small Arms Factory
Royal Small Arms Factory
at Enfield and nearby Waltham Abbey Royal Gunpowder Mills, Wright's Flour Mill (London's last surviving working mill) at Ponders End
Ponders End
and the Three Mills at Stratford. In the 19th Century the lower Lea became an important area for the manufacture of chemicals, in part based on the supply of by-products such as sulphur and ammonia from the Gas Light and Coke Company's works at Bow Common. In the 20th Century the combination of transport, wide expanses of flat land and electricity from riverside and canalside plants such as Brimsdown, Hackney, Bow and West Ham led to expansion of industries including for example Enfield Rolling Mills and Enfield Cables, Thorn Electrical Industries, Belling, Glover and Main, MK Electric, Gestetner, JAP Industries, etc.[3] Much industry has now gone, to be replaced by warehousing and retail parks. The valley also became very important for London's water supply, as the source of the water transported by the New River aqueduct, but also as the location for the Lee Valley Reservoir Chain, stretching from Enfield through Tottenham
Tottenham
and Walthamstow. A second significant corridor of canal, railways and industries was associated with the Brent, stretching from the Thames
Thames
at Brentford, through Isleworth, Greenford, Alperton
Alperton
and Park Royal. The Colne (the historic boundary between Middlesex
Middlesex
and Buckinghamshire) forms much of the western boundary of the county of Greater London.[4][5][6][7][8] Right-bank tributaries[edit] Significant tributaries include the Mole, Wandle, Ravensbourne (tidal reach known as 'Deptford Creek') with its tributary the Quaggy, and the Darent
Darent
and its tributary the Cray which together form part of the eastern boundary of Greater London. Smaller, some mainly subterranean tributaries include the Hogsmill River, Beverley Brook, Neckinger and Effra. The Wandle formed south London's nearest equivalent to the Lea Valley, with an industrial corridor stretching from the Thames
Thames
at Wandsworth through Merton and Mitcham
Mitcham
to Beddington
Beddington
and Croydon. A smaller corridor followed the Ravensbourne from the Thames
Thames
at Deptford Creek through Lewisham, and many of the smaller rivers also once had mills. Canals[edit] A number of canals or canalised rivers have been constructed in the London
London
area, mostly in the late 18th and early 19th centuries. These were originally for goods traffic, which has largely ceased. Within London
London
the canals carried coal from the docks to many canal-side gas works and power stations (for example Brimsdown), and timber to timber yards, furniture manufacturers etc. (for example in Edmonton). Although most of the canals still survive today, they are used primarily for leisure craft. North of the Thames[edit] Canal construction in the London
London
area started with navigation works on the Lea and Stort from 1424 onwards, leading to the River Lee Navigation and Bow Back Rivers. Initially used for transport of agricultural product from Hertfordshire, this later became an important industrial waterway connecting the heavily industrialised Lea Valley with the docks. A short-cut to the Thames
Thames
avoiding the winding mouth of the Lea (Bow Creek) and closer to central London
London
was provided by the Limehouse Cut
Limehouse Cut
(1760). A connection from London
London
to the Midlands had been provided by the Oxford Canal
Oxford Canal
since 1790, but this required navigation up the winding the upper Thames
Thames
to Oxford. The completion of the Grand Junction Canal (later Grand Union) from the Thames
Thames
at Brentford
Brentford
(1798 onwards) provided a more convenient route. In 1801 an arm was opened from the Grand Junction at Hayes to a large basin at Paddington. This was later linked to the Thames
Thames
at Limehouse
Limehouse
(close to the Limehouse
Limehouse
Cut) by the Regent's Canal, completed in 1820. This in turn was linked to the Lea system by the Hertford Union Canal
Hertford Union Canal
or Hackney Cut (1830). The Regent's Canal had many substantial basins (City Road Basin, Kingsland Basin, Battlebridge Basin, St Pancras Basin, Cumberland Basin etc.), originally lined with industries dependent on traffic from the docks. The City Canal
City Canal
(1805) was built to provide a short-cut across the Isle of Dogs. This was later incorporated into the West India Docks
West India Docks
and is no longer connected to the Thames
Thames
at its upstream end. Other short canals connecting to the Thames
Thames
included the Grosvenor Canal
Grosvenor Canal
(1825) and the Kensington Canal
Kensington Canal
(1828). South of the Thames[edit] The former Grand Surrey Canal
Grand Surrey Canal
(1807) was intended to run from the Thames
Thames
at Rotherhithe
Rotherhithe
to the industrial town of Mitcham, but got no further than Camberwell. It closed with the Surrey Commercial Docks
Surrey Commercial Docks
in 1970 and has been filled. The Grand Surrey Canal
Grand Surrey Canal
linked to the Croydon Canal (1809) which continued as far as West Croydon; this closed in 1836. Further afield a link from London
London
to Bristol
Bristol
is provided by the Kennet & Avon Canal which connects the Avon at Bath via the River Kennet to the Thames
Thames
at Reading. Basingstoke
Basingstoke
could once be reached via the Thames, Wey Navigation
Wey Navigation
and the Basingstoke
Basingstoke
Canal. The south coast at Littlehampton
Littlehampton
could be reached via the Thames, Wey and the Wey and Arun Canal. Islands in the Thames[edit]

Note: Only the largest islands are listed here. A longer list can be found in Islands in the River Thames

Chiswick Eyot Eel Pie Island Isle of Dogs

Millwall Cubitt Town

Topography[edit] A list of the highest points can be found in List of highest points in London At the largest scale London
London
lies within the bowl of the London
London
Basin, with most of the built-up area lying on the Tertiary and younger sediments, and only a small part of south London
London
(Sutton, Banstead
Banstead
and Croydon) lying on the chalk backslope of the North Downs. The centre of the basin is dominated by the modern valley of the Thames, which forms a level corridor running from west to east. The modern floodplain is around half a mile wide to the west of Greater London, expanding to two miles wide to the east. This is bordered by slightly higher and older terraces often extending several miles from the floodplain, for example in Hounslow
Hounslow
and Southwark. Other significant river valleys include those of the Colne, Crane, Brent, Lea (with a floodplain more than a mile wide in places), Wandle and Ravensbourne, which run north and south towards the Thames. There are a few notable hills in Greater London, but none of them more than a few hundred feet high, and they have not impeded the development of the city in all directions. It is therefore very roughly circular. The hills in the city of London[edit] The hills in the City of London, from west to east, Ludgate Hill, Corn Hill and Tower Hill, are presumed to have influenced the precise siting of the early city, but they are very minor, and most of central London
London
is almost flat. These hills are developed in various gravel terrace deposits of the river Thames. North London[edit] To the north of the City a ridge capped by sands of the Bagshot formation forms high ground (in places around 130m) including Hampstead Heath
Hampstead Heath
and Highgate Hill. The ridge continues eastwards in the London
London
clay to Crouch Hill and Queen's Wood. To the south, fingers of the ridge run down towards Primrose Hill
Primrose Hill
and Parliament Hill. This ridge is a surviving area of Tertiary rocks younger than the London Clay, surrounded by former routes of the Thames
Thames
where much younger deposits overlie the clay. Smaller outliers of younger Tertiary high ground exist to the west of the main ridge including Harrow Hill where Bagshot sands survive and at Horsendon Hill
Horsendon Hill
and Hanger Lane, where the Claygate Beds of the top of the London
London
Clay formation are capped by much younger gravels deposited by the Thames. To the north of this ridge, between the modern valleys of the rivers Lea and Brent, lies a second ridge (a little under 100m), formed of much younger Pleistocene
Pleistocene
deposits. Running west from Muswell Hill
Muswell Hill
to Church End and north to Whetstone, this is capped by glacial till marking the southern limit of glaciation. This overlies Dollis Hill Gravel marking a former course of the Thames. At its eastern end at Alexandra Palace
Alexandra Palace
the gravel forms the top of the ridge, as it does in smaller hills to the west including Dollis Hill
Dollis Hill
itself, Further north, ridges of Claygate Beds overlain by the pre-glacial Stanmore
Stanmore
gravel form hills and ridges including Mill Hill, Totteridge, Arkley
Arkley
and Monken Hadley, Elstree, and Stanmore
Stanmore
and Harrow Weald Commons. Much of east and northeast London
London
lies on the modern floodplain of the Thames
Thames
or older terraces, a notable interruption being the remains of the artificial Beckton Alps. Pole Hill
Pole Hill
at Chingford
Chingford
and Lippitts Hill near Gilwell Park
Gilwell Park
are capped by small outliers of Claygate Beds, while the higher parts of Epping Forest
Epping Forest
such as High Beach are Claygate and Bagshot beds with later gravels.[9][10][11][12][13] Faulting and folding brings the chalk close to the surface just south of the Thames
Thames
in Lewisham
Lewisham
and Greenwich. This has resulted in a notable ridge formed of Palaeocene
Palaeocene
deposits (the Lambeth Group), which includes Shooter's Hill, Greenwich Park
Greenwich Park
and Blackheath. West of the valley of the Ravensbourne, this ridge continues as Telegraph Hill, Nunhead
Nunhead
and Honor Oak, towards Denmark Hill. To the south Crystal Palace and Sydenham Hill
Sydenham Hill
lie on another outlier of Claygate beds. In south-west London
London
the lower terraces of the Thames
Thames
stop abruptly at a notable bluff cut into the London
London
Clay and running south from Richmond Hill. The higher ground to the east is capped in places by Claygate Beds and older Thames
Thames
gravels dissected by the valley of Beverley Brook, which separates Richmond Park
Richmond Park
from Wimbledon Common.[9][14][15][16] Climate[edit] Main article: Climate of London The climate of London
London
is broadly similar to the rest of the UK, with warm summers, cool winters, no wet or dry season, and often moderate to strong winds. It is classed as a temperate maritime climate according to the Köppen climate classification
Köppen climate classification
system. In terms of the local climate profile, the temperature tends to increase towards the centre of the urban area, primarily because of the urban heat island effect, but also because London's topography results in the central area being the lowest part of the region in terms of altitude. Daytime winter temperatures in London
London
are around 8 °C (46 °F), but can vary from as high as 16 °C (61 °F), down to as low as −7.4 °C (18.7 °F), as occurred during January 1987.[17] Night time temperatures hover a little above freezing, with frosts typically on 25-45 nights, depending on location. Absolute minimum temperatures range from −10.0 °C (14.0 °F) at St James Park, in central London
London
down to −16.1 °C (3.0 °F) at Northolt during January 1962[18] - the lowest official temperature in the London
London
area. More typically though −12 °C (10 °F) to −13 °C (9 °F) is the record minimum for most parts of London, as is shown by the Kew, Heathrow
Heathrow
and Hampstead
Hampstead
figures. The lowest temperature to occur in recent years was −14.2 °C (6.4 °F) at Northolt during 2010.[19] During summer, daytime temperatures are typically around 23 °C (73 °F). Typically, according to 1981-2010 normals, the warmest day of the year at Heathrow
Heathrow
will reach 31.6 °C (88.9 °F),[20] and 26.4 days[21] will attain a temperature of 25.1 °C (77.2 °F) or above. Kew's record high of 38.1 °C (100.6 °F) is the highest temperature in the London
London
area. Sunshine tends to increase towards the west of the London
London
area, with annual average at Heathrow
Heathrow
and Kew
Kew
in excess of 1,600 hours, at Northwood and Hampstead, in the 1,500-1,600 hour range, but at Greenwich, below 1,500 hours. The sunniest year on record at Heathrow was 2003, with, coincidentally, just over 2,003 hours of sunshine.[22] Heathrow
Heathrow
- Airport Weather Station to the west of London,

Climate data for Heathrow
Heathrow
Airport, elevation 25 m, 1981-2010, extremes 1948–

Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year

Record high °C (°F) 16.0 (60.8) 18.6 (65.5) 22.8 (73) 27.4 (81.3) 31.8 (89.2) 34.8 (94.6) 36.7 (98.1) 37.9 (100.2) 31.3 (88.3) 28.8 (83.8) 18.6 (65.5) 16.6 (61.9) 37.9 (100.2)

Average high °C (°F) 8.1 (46.6) 8.4 (47.1) 11.3 (52.3) 14.2 (57.6) 17.9 (64.2) 21.0 (69.8) 23.5 (74.3) 23.2 (73.8) 19.9 (67.8) 15.5 (59.9) 11.1 (52) 8.3 (46.9) 15.2 (59.4)

Average low °C (°F) 2.3 (36.1) 2.1 (35.8) 3.9 (39) 5.5 (41.9) 8.7 (47.7) 11.7 (53.1) 13.9 (57) 13.7 (56.7) 11.4 (52.5) 8.4 (47.1) 4.9 (40.8) 2.7 (36.9) 7.5 (45.5)

Record low °C (°F) −13.2 (8.2) −9.6 (14.7) −5.1 (22.8) −2.6 (27.3) −0.9 (30.4) 1.5 (34.7) 5.6 (42.1) 5.9 (42.6) 1.8 (35.2) −3.3 (26.1) −7 (19) −11.8 (10.8) −13.2 (8.2)

Average precipitation mm (inches) 55.2 (2.173) 40.9 (1.61) 41.6 (1.638) 43.7 (1.72) 49.4 (1.945) 45.1 (1.776) 44.5 (1.752) 49.5 (1.949) 49.1 (1.933) 68.5 (2.697) 59.0 (2.323) 55.2 (2.173) 601.7 (23.689)

Mean monthly sunshine hours 61.5 77.9 114.6 168.7 198.5 204.3 212.0 204.7 149.3 116.5 72.6 52.0 1,632.6

Source #1: Met Office[23]

Source #2: KNMI[24]

Kew
Kew
- Weather station in the South West part of London, adjacent to the River Thames.

Climate data for Kew, 5m asl, 1981-2010, extremes 1901-

Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year

Record high °C (°F) 16.1 (61) 18.5 (65.3) 22.0 (71.6) 26.7 (80.1) 30.6 (87.1) 34.2 (93.6) 35.0 (95) 38.1 (100.6) 33.3 (91.9) 27.8 (82) 18.9 (66) 15.7 (60.3) 38.1 (100.6)

Average high °C (°F) 8.2 (46.8) 8.7 (47.7) 11.6 (52.9) 14.4 (57.9) 18.0 (64.4) 21.0 (69.8) 23.5 (74.3) 23.2 (73.8) 20.0 (68) 15.8 (60.4) 11.3 (52.3) 8.5 (47.3) 15.4 (59.7)

Average low °C (°F) 1.8 (35.2) 1.7 (35.1) 3.4 (38.1) 4.7 (40.5) 7.9 (46.2) 10.8 (51.4) 13.0 (55.4) 12.7 (54.9) 10.3 (50.5) 7.4 (45.3) 4.1 (39.4) 2.1 (35.8) 6.7 (44.1)

Record low °C (°F) −12.8 (9) −11.7 (10.9) −8.3 (17.1) −2.1 (28.2) −3.1 (26.4) −0.6 (30.9) 3.9 (39) 2.1 (35.8) 1.4 (34.5) −3.9 (25) −7.1 (19.2) −11.7 (10.9) −12.8 (9)

Average precipitation mm (inches) 57.2 (2.252) 41.9 (1.65) 42.8 (1.685) 45.3 (1.783) 48.8 (1.921) 49.3 (1.941) 46.8 (1.843) 51.2 (2.016) 52.2 (2.055) 69.7 (2.744) 60.6 (2.386) 56.6 (2.228) 622.5 (24.508)

Mean monthly sunshine hours 59.8 79.9 118.2 173.3 205.3 203.6 218.4 211.1 146.4 117.2 70.6 49.6 1,653.4

Source: Met Office[25]

Hampstead
Hampstead
- Weather Station in North London. The weather station enclosure is the most elevated of any in the London
London
area, and as a result daytime temperatures are typically one degree lower than Heathrow, Kew, Northolt and Greenwich.

Climate data for Hampstead
Hampstead
137m asl 1981-2010, extremes 1960-

Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year

Record high °C (°F) 15.7 (60.3) 18.3 (64.9) 23.1 (73.6) 26.6 (79.9) 29.8 (85.6) 33.7 (92.7) 34.4 (93.9) 37.4 (99.3) 29.4 (84.9) 28.3 (82.9) 17.9 (64.2) 15.3 (59.5) 37.4 (99.3)

Average high °C (°F) 7.1 (44.8) 7.4 (45.3) 10.5 (50.9) 13.3 (55.9) 16.8 (62.2) 19.9 (67.8) 22.4 (72.3) 22.0 (71.6) 18.8 (65.8) 14.6 (58.3) 10.3 (50.5) 7.4 (45.3) 14.3 (57.7)

Average low °C (°F) 2.0 (35.6) 1.7 (35.1) 3.5 (38.3) 5.0 (41) 8.0 (46.4) 10.9 (51.6) 13.2 (55.8) 13.1 (55.6) 11.0 (51.8) 8.1 (46.6) 4.8 (40.6) 2.5 (36.5) 7.0 (44.6)

Record low °C (°F) −10.8 (12.6) −12.2 (10) −6.9 (19.6) −3.2 (26.2) −0.6 (30.9) 1.8 (35.2) 5.6 (42.1) 4.7 (40.5) 2.4 (36.3) −2.4 (27.7) −5.8 (21.6) −8.4 (16.9) −12.2 (10)

Average precipitation mm (inches) 64.7 (2.547) 46.6 (1.835) 48.9 (1.925) 51.5 (2.028) 58.0 (2.283) 54.2 (2.134) 50.4 (1.984) 64.4 (2.535) 56.9 (2.24) 77.7 (3.059) 68.3 (2.689) 62.9 (2.476) 704.5 (27.735)

Mean monthly sunshine hours 57.5 76.4 107.1 151.6 192.2 191.0 199.9 193.0 140.8 109.9 69.4 51.6 1,540.4

Source: Royal Netherlands Meteorological Institute[26]

Northolt - Airfield Weather Station in the North West of London. Temperature extremes range from 37.7 °C (99.9 °F) in August 2003, down to −16.1 °C (3.0 °F) in January 1962.

Climate data for Northolt, 38m asl, 1981-2010

Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year

Average high °C (°F) 7.9 (46.2) 8.3 (46.9) 11.3 (52.3) 14.1 (57.4) 17.7 (63.9) 20.8 (69.4) 23.2 (73.8) 22.9 (73.2) 19.7 (67.5) 15.4 (59.7) 11.0 (51.8) 8.2 (46.8) 15.1 (59.2)

Average low °C (°F) 1.7 (35.1) 1.5 (34.7) 3.4 (38.1) 4.8 (40.6) 8.0 (46.4) 10.9 (51.6) 13.2 (55.8) 12.9 (55.2) 10.5 (50.9) 7.6 (45.7) 4.1 (39.4) 2.1 (35.8) 6.8 (44.2)

Average precipitation mm (inches) 58.2 (2.291) 43.2 (1.701) 45.5 (1.791) 45.8 (1.803) 56.0 (2.205) 47.5 (1.87) 45.3 (1.783) 51.3 (2.02) 50.6 (1.992) 72.2 (2.843) 64.9 (2.555) 59.0 (2.323) 639.8 (25.189)

Source: Met Office[25]

Greenwich
Greenwich
- Weather Station in East London
London
located near the river Thames.

Climate data for London
London
(Greenwich), 7m asl, 1981-2010

Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year

Average high °C (°F) 8.3 (46.9) 8.5 (47.3) 11.4 (52.5) 14.2 (57.6) 17.7 (63.9) 20.7 (69.3) 23.2 (73.8) 22.9 (73.2) 20.1 (68.2) 15.6 (60.1) 11.4 (52.5) 8.6 (47.5) 15.2 (59.4)

Average low °C (°F) 2.6 (36.7) 2.4 (36.3) 4.1 (39.4) 5.4 (41.7) 8.4 (47.1) 11.5 (52.7) 13.9 (57) 13.7 (56.7) 11.2 (52.2) 8.3 (46.9) 5.1 (41.2) 2.8 (37) 7.5 (45.5)

Average precipitation mm (inches) 51.6 (2.031) 38.2 (1.504) 40.5 (1.594) 45.0 (1.772) 46.5 (1.831) 47.3 (1.862) 41.1 (1.618) 51.6 (2.031) 50.4 (1.984) 68.8 (2.709) 58.0 (2.283) 53.0 (2.087) 591.8 (23.299)

Mean monthly sunshine hours 49.9 71.4 107.1 159.8 181.2 181.0 192.1 195.1 138.9 108.1 58.5 37.4 1,480.5

Source: All other data from Met Office,[27]

See also[edit]

London
London
portal

Book: London

Agriculture in London

References[edit]

^ http://www.dgcl.interieur.gouv.fr/sections/a_votre_service/lu_pour_vous/les_grandes_metropol/downloadFile/attachedFile/metropolislondres.pdf?nocache Metropolis: 027 London, World Association of the Major Metropolises[dead link] ^ "10-mile Thames
Thames
flood barrier plan". BBC News. 2005-01-01. Retrieved 2008-01-30.  ^ Jim Lewis 1999, London's Lea Valley, Phillimore, ISBN 1-86077-100-9 ^ Sheet 160 Windsor, Weybridge & Bracknell, 1:25,000 Explorer series, Ordnance Survey, ISBN 0-319-21785-X ^ Sheet 161 London
London
South, 1:25,000 Explorer series, Ordnance Survey, ISBN 0-319-21786-8 ^ Sheet 162 Greenwich
Greenwich
& Gravesend, 1:25,000 Explorer series, Ordnance Survey, ISBN 0-319-21780-9 ^ Sheet 173 London
London
North, 1:25,000 Explorer series, Ordnance Survey, ISBN 978-0-319-24164-6 ^ Sheet 174 Epping Forest
Epping Forest
& Lee Valley, 1:25,000 Explorer series, Ordnance Survey, ISBN 0-319-21988-7 ^ a b Ellison R.A. et al. 2004, Geology of London: Special
Special
Memoir for 1:50,000 Geological sheets 256 (North London), 257 (Romford), 270 (South London) and 271 (Dartford) (England and Wales), British Geological Survey, Keyworth, ISBN 0-85272-478-0 ^ Sumbler M.G. (1996), London
London
and the Thames
Thames
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