Cumberland 231, AAO34B, a Bristol MW6G with ECW B45F body, new in 1963 but kept in store until May 1964 when it was registered and entered service.
AAO34B is being restored by the Cumbria Bus Group - click here for their website and a full history.

Photo taken Sunday 8 August 1965, Keswick Bus Station - Photo of the week 4/12/01