If we are including models then,
My list:-
Austin: A40, 2 x Allegro, 2 x Maxi, Metro, 2 x Mini, 1300, A60,2 x Montego, Maestro.
Jaguar: S-type, 3 x XJ6.
MG: Metro, Montego Turbo, 3 x Maestro EFi.
Morris: Minor, 2 x Mini, Cooper, 2 x Oxford, 1300GT, 7 x Marina, Ital.
Riley: 1.5
Rover: 3 x 2000, 3500SE, 2 x 827, 216, 620.
Singer: Gazelle
Triumph: 6 x 2000, 2 x Vitesse, 2 x Spitfire, 1500, Toledo, Dolomite.
Vauxhall: 3 x Victor, 4 x Viva, Chevette.
Wolseley: 1500.
Including foreign, 95 cars.