The team started the year with two newly built cars - John Cleland in the #5 car and Jeff Allam in the #6 entry. The'91-spec cars can be identified by changes to roll cage design from the previous year.
From the head-on view you can see an extra diagonal brace from the middle of the car to the top of the passenger side B-piller. Seen from the side view, the team had reverted to the shallower angle 'full-length' diagonal rear brace.
The two 91-spec car were used until the second race of the Donington Park double-header. Nick Whale's BMW was stranded in the gravel trap having blown it's engine and spun off on it's own oil. As the leading group of cars approached several drivers hit the oil and spun off, include both Vauxhalls. Allam's car made heavy contact with Whale's stricken BMW, which left both Vauxhall and BMW writen-off. The #5 car was lucky to avoid major damage as the impact with Allam had pushed Whale's car out of Cleland's path.
For the remainder of the year Allam continued in a 91-spec car whilst Cleland was now driving an earlier 90-spec car. It's assumed that Allam had taken over Cleland's car with Cleland now using chassis 011.
At the final two meetings of the year the team ran a third car for Bob Berridge, running as #56. By comparing the three cars we can see that Berridge was in a 91-spec car, the team having built a third car to to replace the one destroyed at Donington.
We know that the third car was chassis 016, so we can assume that the original two must have been chassis 014 and 015, although this leaves a gap in sequence from the previous year.