 Later, AEC Regents reverted to the half cab layout, but all were bodied by Park Royal and many would survive into the late 1970s and early 1980s.AEC also became the main supplier of single-deck buses and coaches, too, with batches of BET style bodied AEC Reliances entering the fleet as well as Park Royal, Plaxton and Duple bodied coaches.East Kent was taken over by the National Bus Company on 1 January 1969, during this time the company's first rear engined double deckers arrived.