Oh, Mr Porter, what could he do? Michael Portillo is in Crewe, a town steeped in railway history and immortalised in Victorian music hall, to investigate the making of the iconic cinema classic, The Night Mail during the 1930s.

Michael Portillo continues his 1936 Bradshaw's-inspired railway tour of North Wales in the coastal city of Bangor before turning south from Llandudno Junction to travel the Conwy Valley Line to Betws y Coed, the gateway to Snowdonia.