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}}'''GWR Corridor Third (TK) 1087 ''' is one of four 1938-built Collett Corridor Third (TK) such coaches on the SVR, along together with [[GWR 1086 Full Third |1086]], [[GWR 1116 Full Third |1116]] and [[GWR 1146 Full Third |1146]]. They By the time they were built in 1938, CME Charles Collett had introduced more modern designs to succeed the 'bow-ended' stock. These included large picture windows to replace the external door to every compartment, with access to the coach being via vestibules at Swindon each end. Following a GWR policy decision in late 1937, the 1938 design was built to diagram number C77 a more restricted loading gauge as lot number 1593used by the LNER and LMS, such vehicles being identified by a yellow disc on the body ends. The 1938 design also reintroduced two extra entry doors on the corridor side.<ref>[[Bibliography#Other References|Harris (1966)]] p. 104.</ref> These particular coaches have 8 compartments each seating 8 passengers, plus a toilet at each end of the coach.

After passenger service==Service==They were built at Swindon to diagram number C77 as lot number 1593, with 1087 was later numbered 079158 and 99235entering service in March 1938. The former number signified Departmental Coaching stock within the Western Region that did not normally move or had its movements confined to a particular depot or yard<ref>[[Bibliography#Other References|Longworth (2018)]] p. The latter number signifying hauled non-passenger carrying use; all four of the SVR TKs formed part of the Swindon GWR test train which was used for load testing of diesel locomotives55. </ref>

The entire 1087 continued in passenger service in the BR Western region as W1087W until April 1965, when it withdrawn and transferred into [[Carriage and Wagon numbering# Internal User vehicles|Internal User stock]] as number 079154. It then formed part of GWR's 9-coach '''Swindon test train was sold into preservation in 1969''', with the four coaches being bought for the SVR. All four Full Thirds were restored between 1970 and 1973, and saw service on further details of which may be found under [[The Severn Valley Railway on the main line#SVR Carriages used on the main line GWR 1146 Full Third | SVR excursions on the main line1146]] as well as on the SVR itself.

==Preservation==The entire 9-coach test train was sold into preservation in 1969, with the four TKs and [[GWR 7284 Composite|Corridor Composite 7284]] being bought for the SVR and arriving on 19 December. All four Full Thirds were restored between 1970 and 1974, and saw service on [[The Severn Valley Railway on the main line#SVR Carriages used on the main line | SVR excursions on the main line]] in the mid to late 1970s (for which 1087 received [[TOPS codes|TOPS Code]] 99235) as well as on the SVR itself. 1087 is owned by the [[Great Western (SVR) Assoc. | The Great Western (SVR) Association]].

Railway Heritage Register Carriage Survey<brreferences/>SVR Stock Book Ninth Edition