There’s a subterranean world beneath Notting Hill Gate. At the end of the 1950s and into the 1960s, lifts were replaced with escalators and passageways were sealed off as a result. But an enormous chamber beneath the street remains, lined with brightly coloured posters advertising the top movies and products of a bygone era, from Around the World in 80 Days to toothpaste. Routine work in 2010 revealed this long-lost world, although there’s currently no public access.

These images capture the history of train travel

Hidden bunkers and abandoned stations: secrets of the London Underground