What are London's WWII deep-level air-raid shelters used for?
16 May 2014 Last updated at 03:47 BST
A disused Second World War bunker large enough to accommodate up to 8,000 people is being let by Transport for London.
The deep-level air-raid shelter lies 100 feet below ground in south London, and is one of eight built beneath the capital during the war.
Newsnight's Stephen Smith arranged a viewing.