Of course only an idiot would now say that the Beeching cuts were necessary. We need to forget that time and get on with rebuilding our rail network - firstly to reverse all the Beeching cuts, then start filling in the gaps with interurbans, light railways and industrial routes, ready for an oilless future. Not only does rebuilding and extending the network need to happen quickly but so does electrification of the entire rail network - and yes I do include heritage routes, narrow gauge lines etc!
Scotland is starting the process, albieit very slowly. Take a listen to this http://www.bbc.co.uk/iplayer/episode/b0120783/Reversing_Dr_Beeching/