In 1946 AEC resumed civilian production with the 0661/20 Regent II and the 0662/20 Regal I. These were not new models but a recommencement of the most basic AEC 1939 specification bus models. The single-decker was going to be marketed as Regal II until somebody at Southall remembered the 1936-8 lightweight 0862 model of that name and as a result the name was corrected after the launch publicity had been printed. At the end of 1946 the postwar 0961 RT was in build and by 1948 Mammoth Major, Matador and Monarch Mk IIIs were in production, followed by the 'provincial' Regent III and the Regal III.