//Her actions were greeted with astonishment by her political opponents who said she was guilty of putting train passengers...at risk.//
I doubt that very much. I have been using trains extensively throughout. The railway companies are being paid huge sums to cart around carriages full of fresh air. I've made at least one return railway journey most weeks, sometimes two or three over distances of between fifteen and two hundred miles. I can't say I've seen a train more than about 10% full.