The RTWs were London's first 8 feet wide buses - RTs and RTLs were 7 feet 6 inches wide.  Although originally confined to outer areas, after tests for suitability, they were allowed to operate in central London.  Unusually, the bodies were constructed by Leyland also.  The extra six inches were taken up by a one-inch wall spacer on each seat, and four inches extra on the central isle. The first batch were manufactured in 1949 with the remainder coming in 1950-1.  They were allocated to specific central London routes being 6, 6A, 8, 8A, 11, 15, 22, 34B, 46 and 76.  They were withdrawn from passenger service during 1964-1966, but remained as trainers for the 8-feet wide Routemasters until 1969.  The final RTW was sold in 1971.

RTW 29 entered service in 1949 at Tottenham garage on route 41.  She transferred to Hamersmith (Riverside) garage in 1951, where  the vehicle spent the next seven years working route 11.  After a few years out of public service, she went to Willesdon garage until 1965 when she became a trainer.  She was finally sold in 1969, and was preserved in 1975.