Drinking on trains, where do we stand? A glass of M&S wine on a Friday night as you slide out of London is delightful, although plastic wine glasses with peel-off lids are twee and embarrassing. But a 24-pack of Tennent’s and a rowdy group of lads on a stag? This is what I was faced with on the train from Edinburgh to Aviemore last week. I spied them on the platform – shouty, each one clutching a carrier bag with tins bulging like haemorrhoids – and walked towards another carriage where I bagged a window seat. Alas, this was too close to enemy lines and I heard them approaching.