The Q38 stock was built in Gloucester as part of the 'New Works' programme, a major modernisation scheme that began in 1935. The modern cars had stylish windows and distinctive flared sides, which were partly to stop people riding on the outside of cars. Used on the District line from 1939 to around 1970, the new cars were often combined with older stock. London Transport Museum has two Q38 driving motor cars, No. 4416 and No. 4417.
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