GS 42 entered service for London Transport in 1953, operating from Dorking garage, Surrey, but in 1955 she went up to work on Hertfordshire and Buckinghamshire routes until 1962.  From 1962 the vehicle was used for training but returned to passenger service in the mid-1960s, based at Dorking, and used on route 433.  From 1968 she returned to training duties, but in 1971 she went back into passenger service for London Country on route 336A, serving Loudwater Village, near Rickmansworth, Hertfordshire.  This vehicle has the distinction of being the last GS in service for London Country, on 30th March 1972.  She was sold to a school in Ashford, Middlesex later in 1972, but was bought for preservation by the present owner in 1973, and has been shown at rallies ever since.