Huge PS13m plan to transform abandoned UK tunnel into Europe's 'longest' - Incredible PS13m plan to reopen 'dangerous' UK tunnel that was abandoned 50 years ago - Tolls start dates for London tunnels revealed - The huge 177,000-mile network of secret tunnels that could be 'a treasure' for the UK - The eerie 1.4 mile UK train tunnel that will never be open to the public again - Incredible new live map of UK's secret underground tunnels to save Brits PS2.4billion - Mt Victoria tunnel: Government makes decision, Wellington getting two new tunnels - The incredible 2.5-mile tunnels right under a Spanish city loved by British tourists - Subsea tunnels linking Scottish islands 'not fantasy', say experts - The mega PS1bn project to 'rewire' major UK city with 20 miles of underground tunnels