Believe that if you want to .... but thats not what my parents / grandparents say. It was a wonderful service, prompt, clean and value for money taking families to the coast for their jollies. Pleasure to travel on.
It wasn't until the Tory Government of 1963 who appointed Richard Beeching to review the railways that it all went tits up. He cut 67000 jobs, 55% of stations and a third of the rail network
Dr Beeching didn't cut anything.
He wrote two reports, the first covering rationalisations, the second modernisation.
Ministers (Governments) made the decisions. Whilst they generally implemented the 1st report recommendations enthusiastically, they didn't close all the lines/stations Beeching recommended (and in some cases they closed ones he had recommended stayed open).
When it came to the 2nd report, about modernisation and new investment, they were a bit less enthusiastic, with many of the recommendations not carried through.
Incidentally, there had been various line closures even before Beeching, and a few came after. e.g. The way that railways had been developed in Britain by private companies, there were duplicating lines on some routes that made no sense under a single national network.
Also, bear in mind that whilst Labour campaigned in the 1964 General Election to stop the cutbacks to the network, once in Government they didnt actually reverse anything. In fact, the Wilson Government carried on cutting lines and stations throughout the 1964-1970 period. e.g. the passenger service to Fleetwood wasn't cut until May 1970.