In London, all space has value. That extends to those musty old Tube stations long abandoned by commuters but whose tunnels, corridors and platforms are now being used for everything from underground farms to film locations.

These ghost stations are the subject of a new book, Hidden London. It is being published ahead of an exhibition at the London Transport Museum that looks at some of the innovative ways Tube stations have been used since they were taken out of active service.

One such station is Brompton Road. Owned by the Ministry of Defence since the Second Word War, it was used as the command HQ for the London anti-aircraft brigade. It was bought in 2014 by Ukrainian billionaire Dmytro Firtash, who spent an initial £53 million and hoped to convert the site into luxury flats.

Those plans were then put on hold while he unsuccessfully fought efforts to extradite him from Austria to the US, where he faces bribery charges. In the meantime, Brompton Road slowly decays.

Other ghost stations are in better nick and can be seen on the London Transport Museum’s Hidden London tours. These take subterranean explorers into stations that have been completely abandoned, such as Down Street in Mayfair and Aldwych on the Strand, or into the disused parts of “living” stations such as Charing Cross, Piccadilly Circus and Euston.