The RT bus was the bus of my childhood - the predecessor of the Routemaster which was introduced in 1954. Here with the driver and the conductor. The bus had preselector gearboxes and as children we liked to sit in the front offside seat downstairs where you could see into the drivers cabin. Upstairs was for smokers and in the 1950s that meant a lot of the passengers and in the winter a terrible unhealthy fug. No standing was allowed upstairs.