The British Rail Class 207 ( 3D)

diesel-electric multiple unit A diesel multiple unit or DMU is a multiple-unit train powered by on-board diesel engines. A DMU requires no separate locomotive, as the engines are incorporated into one or more of the carriages. Diesel-powered single-unit railcars are als ...

s were built by BR at

Eastleigh Eastleigh is a town in Hampshire, England, between Southampton and Winchester. It is the largest town and the administrative seat of the Borough of Eastleigh, with a population of 24,011 at the 2011 census. The town lies on the River Itchen, ...

in 1962. The fleet had a lifespan of 42 years. The Southern Region class 201 to 207 DEMUs are nicknamed 'Thumpers' due to the noise their engine units make.

Operational history

When new the class were used on the

Oxted Line The Oxted line is a railway in southern England and part of the Southern franchise. The railway splits into two branches towards the south and has direct trains throughout to London termini. It was opened jointly by the London, Brighton and S ...

, and were mostly concentrated on services between and Uckfield and Eridge to Tonbridge via . Other routes that the units operated included occasional workings on the

Marshlink Line The Marshlink line is a railway line in South East England. It runs from Ashford, Kent via Romney Marsh, Rye and the Ore Tunnel to Hastings where it connects to the East Coastway line towards Eastbourne. Services are provided by Southern. Th ...

, the

Three Bridges to Tunbridge Wells Central Line 3 is a number, numeral, and glyph. 3, three, or III may also refer to: * AD 3, the third year of the AD era * 3 BC, the third year before the AD era * March, the third month Books * '' Three of Them'' (Russian: ', literally, "three"), a 1901 ...

and the

Cuckoo Line The Cuckoo Line is an informal name for the now defunct railway service which linked Polegate and Eridge in East Sussex, England, from 1880 to 1968. It was nicknamed the Cuckoo Line by drivers, from a tradition observed at the annual fair at ...

. Following the closure of the last two of these routes the unit gained workings on the

Redhill to Tonbridge Line Redhill may refer to: Places England * Redhill, Bournemouth, Dorset * Redhill, Herefordshire, a location * Redhill, Nottinghamshire * Redhill, Hook-a-Gate, Shropshire * Redhill, Sheriffhales, Shropshire * Redhill, Telford, a location in Shrops ...

, and were known to deputise for 3R units on the

North Downs Line The North Downs Line is a passenger-train line connecting Reading, on the Great Western Main Line, to Redhill and , along the Brighton Main Line, linking many centres of population in that part of the North Downs which it traverses en route. ...

to . Most units were withdrawn in 1987 following the electrification of the Oxted Line's branch. Four of the seven surviving units were used on the

Reading to Basingstoke Line Reading is the process of taking in the sense or meaning of letters, symbols, etc., especially by sight or touch. For educators and researchers, reading is a multifaceted process involving such areas as word recognition, orthography (spelling ...

between 1988 and 1993; once this had finished three were withdrawn and the fourth sent to join the other three survivors on the Marshlink Line; between 1995 and 1998 this included through services from to . After this the class operated on the Marshlink Line between Ashford and and the Oxted Line between London Victoria and for privatised companies

Connex South Central Connex South Central was a train operating company in the United Kingdom owned by Connex that operated the South Central franchise from 26 May 1996 until 25 August 2001. History On 26 May 1996, Connex commenced operating the Network SouthCent ...

and Southern. The final three units were withdrawn in August 2004.

Technical details

;Power car (one per set): * Introduced: 1962 * Weight: * Engine: English Electric 4-cylinder type 4SRKT Mark II of at 850

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

* Transmission: Electric, two English Electric type EE507

traction motor A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives, electric or hydrogen vehicles, elevators or electric multiple unit. Traction motors are used in electrically powered rail vehicles ( electric multiple ...

s rated at each. * Maximum tractive effort: * Driving wheel diameter: * Coupling code: Standard ' Buck eye' compatible with contemporary Class 20x and 4xx units. * Train heating:

Electric Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by ...

Preservation

Three complete units have been preserved: *207017 -

Spa Valley Railway The Spa Valley Railway (SVR) is a standard gauge heritage railway that runs from Tunbridge Wells West railway station in Tunbridge Wells to High Rocks, Groombridge, and Eridge, where it links with the Oxted Line. It crosses Kent and Ea ...

(3-car unit) *207202 - Coulsdon Old Vehicle & Engineering Society,

Bicester Bicester ( ) is a historical market towngarden town and civil parish in the Cherwell district of northeastern Oxfordshire in Southern England that also comprises an eco town at North-East Bicester and self-build village aGraven Hill Its loca ...

(2-car unit numbered 1305); on offer to the

Bluebell Railway The Bluebell Railway is an heritage line almost entirely in West Sussex in England, except for Sheffield Park which is in East Sussex. It is managed by the Bluebell Railway Preservation Society. It uses steam trains which operate between an ...

. *207203 -

Swindon and Cricklade Railway The Swindon and Cricklade Railway is a heritage railway in Wiltshire, England, that operates on a short section of the old Midland and South Western Junction Railway line between Swindon and Cricklade. Swindon and Cricklade Railway is a regis ...

(2-car unit) - DMBSO 60127 damaged by fire on 20 May 2016. Class 205 DTCsoL 60822 will be added to replace DTSO destroyed by fire. This vehicle had been stored at Pershore (ex unit 1123) and arrived at the Swindon & Cricklade Railway on 17 June 2016. TS 60669 (ex unit 1124) also stored at Pershore arrived at the same time and will be stripped of usable spares to restore 60822. In addition, driving motor vehicle from unit 207013 has also been preserved: *207013 - DMBSO 60138 (Cab Only) - Reduced to just a cab in May 2016 and remaining section at the South Wales Cab Preservation Group. The centre trailer from unit 207203 has been at a private location: *207203 - TSOL 70547 - Private site,

Hungerford Hungerford is a historic market town and civil parish in Berkshire, England, west of Newbury, east of Marlborough, northeast of Salisbury and 60 miles (97 km) west of London. The Kennet and Avon Canal passes through the town alongside the ...

DTSO 60901 from 207203 was preserved until it was destroyed in an arson attack on 20 May 2016.

Fleet details

Unrefurbished Class 207/0
Refurbished Class 207/1
Refurbished Class 207/2
Departmental Units

Operational history

Technical details

Preservation

Fleet details

References

Further reading