Birch Bros K213, LXV213 a Guy Arab III with Willowbrook FH27/26F body, new in 1951.
These buses were designed for the London to Rushden route and had an extra large luggage compartment, upstairs in front of the stair well. They were also gives names - K213 was known as Adam de Cordonnel. It was withdrawn in 1963.

Photo taken by Peter Green, May 1960, Kings Cross