The Volvo Ailsa B55 was a front-engined double-decker bus chassis built in Scotland by Ailsa, Volvo's British commercial vehicle agency. It was in production from 1973 to 1985, and was a relatively successful alternative to the ubiquitous rear-engined Bristol VR, Leyland Atlantean and Daimler/Leyland Fleetline of the period.
The vehicle first appeared at the 1973 Scottish Motor Show, and was well received.