WWII tunnels used by spies to become tourist attraction

Behind a blue door in a narrow London passage lies a little-known network of tunnels deep underground, once home to British spies and a secret long-distance telephone exchange.

Thirty metres below the UK capital's bustling streets, all that can be heard in the tunnels built to withstand a nuclear attack is the rumble of the London Underground's Circle Line. The Australian-born entrepreneur's private equity firm bought the little-known Kingsway Exchange Tunnels in September 2023 from British Telecom.

The site, which stretches for over a mile, is underway to transform into a major tourist attraction "honouring the history and heritage of London" with a planned opening in 2028.