With this and your previous graph: correlation is not causation. You have chosen only one single possible cause, i.e. privatisation. The turning point comes just before privatisation came into effect. I would suggest that was from the pick-up after the UK was forced out of the ERM. As well as the state of the road system encouraging people onto rail, there is the increasing effect of exporting employment into city centres from outlying districts (and I don't just mean London), Those people who still have sufficient disposable income are travelling more frequently, by road, rail, air and sea.
As to "Socialism for the rich, and capitalism for the less well - off", what is meant is governments stepping in and paying eye-wateringly large sums of money to business entities deemed too big to fail, and then loading the costs onto ordinary people and shrinking services for those at the very bottom. It happened in 2008 - 12, and it will happen again after the present crisis has gone.
Anyroad up, here we are, arguing about fine points and splitting hairs, while those at the top laugh at us on the way to their tax havens.