Platform 1 at Paddington Station is not usually a place I find myself at 11pm on a Monday night, but I’m here with good reason. I am about to catch Great Western Railway’s Night Riviera Sleeper from London to Penzance in Cornwall at the very tip of the UK’s southwest peninsula. I’ve been visiting Cornwall since before I could walk. I’ve taken the ordinary train, the coach and braved the summer getaway traffic jam chaos by car more times than I can count. But I’d never even considered taking a sleeper train as an option until now. Turns out this was a major mistake. A scenic sunrise and superb …