7TC
In 1963, a 7-coach trailer set was formed by placing five former 4-SUB trailer cars between the two driving cars from unit 2006. The set was intended for use on the Oxted line, where it was hauled by diesel locomotives.
The motors from former DMBS car number 10573 were removed, and the whole set was re-wired to enable the hauling diesel locomotive to provide the electric train heating. Six (out of nine) compartments of one of the 4Sub Trailer Second cars (number 11485) were refitted as first class compartments, thereby making it a Trailer Composite.
The set was originally numbered 900 in the old hauled carriage set number series, but this was amended in February 1966 to 701 in the new series for trailer control units. Despite this, and its designation as 7-TC (7-car Trailer Control stock), it was not a real trailer control unit in that a locomotive could not be operated remotely from the unit's driving cars.
The unit was stored from December 1967 and then withdrawn in April 1969. However, while the two driving cars were scrapped the following year, all five trailers were reused in other units. Four returned to 4-SUB formations, but 11485 underwent a further conversion, this time to a 4EPB Trailer Second, and was renumbered 15084. Full details of the 7-TC formation, the origin of the individual cars and their subsequent disposal are set out in the table below:
| Carriage Number | Carriage Type | Former Unit | Re-use/Disposal |
|---|---|---|---|
| 10573 | TBS (ex-DMBS) | 2-BIL 2006 | Scrapped (1970) |
| 10351 | TS | 4-SUB 4328 | 4-SUB 4132 |
| 10353 | TS | 4-SUB 4352 | 4-SUB 4364 |
| 11485 | TC (ex-TS) | 4-SUB 4115 | 4-EPB 5115 (as TS 15084) |
| 10349 | TS | 4-SUB 4346 | 4-SUB 4132 |
| 10346 | TS | 4-SUB 4329 | 4-SUB 4131 |
| 12107 | TC (ex-DTC) | 2-BIL 2006 | Scrapped (1970) |
Read more about this topic: British Rail Class 401