The Royal Tiger PSU1 was originally planned over eight variants PSU1/1 to PSU1/8 with a wheelbase of to suit the then UK maximum length of , width was allowed from 1948 but only on officially-approved routes until 1950.
Unlike the home market Olympic,[REF] launch orders were impressive, Ribble Motor Services indented for 120, Ulster Transport Authority requiring 111, Red & White Services 52, Wallace Arnold 22 and Associated Motorways (Black & White) 15 [REF].