Anyone who laments the current state of Britain’s privatised rail network, with its high fares, overcrowding and delays (and the buffet car? Let’s literally not even go there), may well feel a pang of wistfulness at this truly epic commercial, made in the days when trains were run for the benefit of the passengers rather than the shareholders.

Simply entitled, ‘Britain’s Railway’ – and inspired by a 1936 short film featuring a poem by W.H. Auden – it was only ever shown in full once, on Christmas Day in 1988, and is now a glorious flashback to a different age, when travel on the country’s trains was something a little more enjoyable than a breathlessly expensive chore. Oh and look out for the viaduct from Harry Potter at 1:40…