So many to list and remember! (My dad was a mechanic during the 60's and was forever changing/swapping/trading cars.)
Here's some I can think of:-

Fiat Topolino
Jaguar 3 1/2 litre
Armstrong-Siddeley Sapphire
Wolseley 16/60
Wolseley 1500
Riley (same type body as the wolseley)
Austin A35
Austin A40 Somerset
Austin A40 'Farina'
Austin 1300
Singer Le Mans
Standard Twelve (I think?)
Standard Vanguard
Standard Vanguard Vignale
Citroen DS21
Citroen Ami 8
Morris minor (older style split windscreen)
BMC EA van
VW camper (typ 2) (old 6-volt split screen)
Fiat 126
Reliant Regal 700 Supervan
Reliant Rialto (two versions)
Reliant Kitten Estate
Reliant Rebel Estate
Humber Hawk
Vauxhall viva (mk.I)
Vauxhall viva (later model Hb?)
Ford Popular (older sit up & beg type.!)
Ford popular (early 60's)
Hillman Imp
Skoda Estelle 120
(He also had quite a few motorcycles)