Pete Owens wrote:I think the cultural change happened very rapidly - between 1965 and 1975. ...
That seems just about right to me. My dear old dad who still had a driving licence from his WWII days bought a Mini Clubman (C reg with the C on the end.) He was worried that he might find the conversion from a three ton truck to such a tiny car hard so he had me learning too.
There were all sorts of developments around that time - Beeching cutting the railways, the start of the motorway programme - which both facilitated and reflected the changes in travel modes. I'd say a there were a couple of things that really influenced increasing car ownership. One was increasing mass-production of cars which brought down the relative price of the "family" car. Another was the increase in the availability of consumer credit and a new willingness to use it.
There were quite a lot of car owners in those days who had no need for a car in their daily lives and only made leisure trips: that's the origin of the insult "Sunday driver."