One of the pioneering services between Lancashire and London commenced during the late 1920s operated by Holt Brothers (Rochdale) Limited, a company which formed the basis of the famous Yelloway Motor Services Limited. The service comprised a Blackpool-Manchester-London service with a feeder service into Manchester from Blackburn, Rochdale and Oldham. South of Manchester the service travelled through Derbyshire, Leicestershire, Northamptonshire, etc. The geographical shape of the route lent itself quite suitably to make a bold 'Y' used on the timetable cover. The gap between Northampton and Dunstable on the diagram reflect the removal of stops at Newport Pagnell and Hockliffe. (A 1955 version of this cover featuring these two locations appears at: www.flickriver.com/photos/36844288@N00/7404090288 )