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London's Underground network is a labyrinth of tunnels, passageways and platforms and, over the years, many stations have been abandoned and then largely forgotten.

However, the London Transport Museum is offering guests another the chance to adventure deep into the bowels of the city and explore these secret sites on one of its Hidden London tours.

Running from October to December, they will give a rare glimpse of the places that are usually shut off to the public.

One tour will venture into Down Street, otherwise known as “Churchill’s secret station”. It was a functioning part of the Tube system for an early part of the 20th century, but took on a new life when it became the wartime Prime Minister’s secret bomb shelter during the Blitz.

Elsewhere, the long forgotten tunnels at Charing Cross will be opened up, offering the chance to wander underneath Trafalgar Square. The station’s deserted Jubilee line platform, used during the filming of Skyfall and Paddington, will also be accessible.

Over at Euston, various former public tunnels and passageways will be explored, with a gallery of vintage Tube posters also on display.

Above ground, there will also be a tour of 55 Broadway, London's first ever skyscraper and the former headquarters of London Underground. It will feature a trip to the top of the 14-storey, Grade I-listed building for a rooftop panormama.

For more information on all the tours and to buy tickets, click here.