 Two demonstrators were built, 7800DA and 8072DA, both vehicles being painted in Wolverhampton Wanderers' colours of yellow and black.7800DA had six more seats than 8072DA, and, cleverly, the seating capacity of each vehicle was hidden in the registration number..The majority of vehicles were fitted with Roe bodies, the others being bodied by Northern Counties (1) and East Lancashire Coachbuilders (5).