Conversions
After the war, 132 of the trailer cars were rebuilt for use with the R Stock, being converted into Driving Motor cars and reclassified R38 Stock. The conversion to R stock was helped by the fact that one end was designed to be easily convertible to a driving cab, including the provision of driver's cab doors.
In 1959/60, 17 Q38 trailers were converted for use as trailers with the CO / CP Stock. This was in connection with the conversion of Circle Line trains from five to six cars in length. A further eight were converted when the A62 stock displaced the P stock on the Metropolitan Line, with the P stock being transferred to the District Line.
Read more about this topic: London Underground Q38 Stock