The British Rail Class 122 diesel mechanical multiple units were built by Gloucester RC&W in 1958. Twenty single-car, double-ended driving motor vehicles, nicknamed "Bubble Cars", were built, numbered 55000–55019. These were supplemented by nine single-ended trailer vehicles, numbered 56291–56299 (some of which were later renumbered into the 54291–54299 block).

Construction

Operation

The Class 122s were built mainly for use on the

London Midland Region of British Railways The London Midland Region (LMR) was one of the six regions created on the formation of the nationalised British Railways (BR), and initially consisted of ex-London, Midland and Scottish Railway (LMS) lines in England, Wales and Northern Irela ...

, although some were also used in Scotland. They were used on a variety of lightly used lines, many of which were closed during the

Beeching Axe The Beeching cuts (also Beeching Axe) was a plan to increase the efficiency of the nationalised railway system in Great Britain. The plan was outlined in two reports: ''The Reshaping of British Railways'' (1963) and ''The Development of the ...

in the 1960s including the ex-

LSWR The London and South Western Railway (LSWR, sometimes written L&SWR) was a railway company in England from 1838 to 1922. Originating as the London and Southampton Railway, its network extended to Dorchester and Weymouth, to Salisbury, Exeter ...

lines in West Devon and North Cornwall. Routes served included the

Stourbridge Town Stourbridge Town is a railway station near the centre of Stourbridge, West Midlands, England. It is situated at the end of a short branch line linking the station with Stourbridge Junction, 0.8 miles away, where passengers can change for main ...

and

St Albans Abbey St Albans Cathedral, officially the Cathedral and Abbey Church of St Alban but often referred to locally as "the Abbey", is a Church of England cathedral in St Albans, England. Much of its architecture dates from Norman times. It ceased to be ...

branch lines, as well as local services between

Dundee Dundee (; sco, Dundee; gd, Dùn Dè or ) is Scotland's fourth-largest city and the 51st-most-populous built-up area in the United Kingdom. The mid-year population estimate for 2016 was , giving Dundee a population density of 2,478/km2 or ...

and

Arbroath Arbroath () or Aberbrothock ( gd, Obar Bhrothaig ) is a former royal burgh and the largest town in the council area of Angus, Scotland, with a population of 23,902. It lies on the North Sea coast some ENE of Dundee and SSW of Aberdeen. The ...

. (The similar Pressed Steel Company built Class 121 single units were also used on the Western Region). During the 1990s, refurbished Class 122 units were used on the Cornish branches between Liskeard and Looe and St Erth and St Ives.

Parcels conversion

In 1968, three cars (55013–55015) were converted for use on the

Scottish Region The Scottish Region (ScR) was one of the six regions created on British Railways (BR) and consisted of ex-London, Midland and Scottish Railway (LMS) and ex-London and North Eastern Railway (LNER) lines in Scotland. It existed from the creation o ...

to carry parcels traffic and were reclassified Class 131, though the vehicles themselves were not renumbered. The converted vehicles were given the

TOPS Total Operations Processing System (TOPS) is a computer system for managing railway locomotives and rolling stock, known for many years of use in the United Kingdom. TOPS was originally developed between the Southern Pacific Railroad (SP), S ...

classification DXV.

Usage after passenger service

Upon privatisation of Britain's railways, the Class 122 fleet has been withdrawn from normal service. However several units were operated by EWS and

Network Rail Network Rail Limited is the owner (via its subsidiary Network Rail Infrastructure Limited, which was known as Railtrack plc before 2002) and infrastructure manager of most of the railway network in Great Britain. Network Rail is an "arm's leng ...

(previously

Railtrack Railtrack was a group of companies that owned the track, signalling, tunnels, bridges, level crossings and all but a handful of the stations of the British railway system from 1994 until 2002. It was created as part of the privatisation of ...

) in departmental service, reclassified as Class 960.

Preservation

"Bubble Cars" have proved popular for preservation on

heritage railway A heritage railway or heritage railroad (US usage) is a railway operated as living history to re-create or preserve railway scenes of the past. Heritage railways are often old railway lines preserved in a state depicting a period (or periods) i ...

Models

Dapol has released models of the class 122 railcar in both

O gauge O scale (or O gauge) is a scale commonly used for toy trains and rail transport modelling. Introduced by German toy manufacturer Märklin around 1900, by the 1930s three-rail alternating current O gauge was the most common model railroad scal ...

and

OO gauge OO gauge or OO scale (also, 00 gauge and 00 scale) is the most popular standard-gauge model railway standard in the United Kingdom, outside of which it is virtually unknown. OO gauge is one of several 4 mm-scale standards (4 mm to 1 foot, ...

in a variety of liveries.

References

Sources

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External links

Entry
at the Railcar Association for class 122 {{British Rail DMU 122 Gloucester multiple units Train-related introductions in 1958