A network of tunnels used during World War II and the Cold War, located underneath Kingsway, near High Holborn, are set to become the capital’s latest tourist attraction. 

The BT Group has agreed to sell the tunnels to London Tunnels Ltd, a consortium led by Australian banker Angus Murray and backed by a private equity fund. The firm will invest £140m in restoring the site and an additional £80m for the installation of interactive screens and other museum features.

London Tunnels has selected WSP to conduct the engineering surveys on the site and design the new museum. Also working on the project will be WilkinsonEyre, the architect behind Singapore’s Gardens by the Bay and London’s Battersea Power Station. 

Known as the Kingsway Exchange Tunnels, the network features over 8,000 square metres of tunnels 40m beneath the Chancery Lane tube station in High Holborn.

The tunnels were built in the early 1940s to shelter Londoners during the Blitz. They were...