The train back from Oxford, goes through Reading, stopping briefly, then the same at Slough, before making the final run into Paddington. Somewhere near Old Oak Common, on the way in, there’s a goods yard on the left and a service depot on the right. Sitting on the right side of the train, facing forward, just before the depot, you can look out over all of London, from the west to the east, taking in the Trellick Tower, London Eye, the Gherkin, BT Tower, Centrepoint, the whole lot. And then it’s gone, the depot momentarily blocks the view; after the depot, the scene’s changed and you’re nearly home.