London Underground Q Stock

Some units were withdrawn in the early 1960s, although six- and eight-car trains remained on the District line with use gradually diminishing to peak hours only, and four car units worked the East London line until 1971.

As part of the 1935–40 New Works Programme, the replacement of these trailer cars and upgrading the fleet with electro-pneumatic brakes and guard controlled air-operated doors was the priority.

[1] The modern motor cars were converted and reclassified 'Q Stock', followed by their two-digit year.

Some detail eight-car formations of two three-car and one two-car units, whilst six-car trains ran off-peak without the two-car pair, whereas many off-peak trains were four cars in length.

[11] The trains transferred to the East London line had their two-car units removed and placed in store.

A Q stock train on the District line at Gunnersbury in 1955. The first car is Q23 stock; the second car is Q35 stock; the third and fifth are Q38 stock; and the fourth and sixth are Q27 stock.