Tickets go on sale at 10am this morning for a late-May trip into one of London's unique subterranean landmarks. The Thames Tunnel between Wapping and Rotherhithe normally buzzes with Overground trains. For three days only, however, you can walk along its length courtesy of Transport for London.
The tunnel, started by Marc Brunel in 1825 and finished with help from his son Isambard, is said to be the first beneath a major river anywhere in the world. It was originally created as a foot tunnel, but has carried rail lines for much of its life. Today, you can pass through its brick arches any time you like for the price of an Oyster fare, but it's a rare day indeed when the public can inspect this extraordinary engineering up close.
The tunnel will open for tours on 24-26 May during a period of line closure. Tickets cost £18 (plus £1.50 booking fee via London Transport Museum), with all proceeds split between the Brunel Museum in Rotherhithe and the Railway Children’s Charity.
Previous experience suggests these tours will sell out very quickly, so be ready at 10am. Tickets will be available from here.