Blisworth Tunnel has no tow path inside, but is wide enough for two narrowboats to pass in opposite directions. Work began in 1793, but errors by contractor left a wiggle in the tunnel, and after three years work it collapsed due to quicksand, claiming the lives of 14 men. It was then decided to begin again with a new tunnel. By the time the rest of the Grand Junction Canal had opened between London and Braunston, Northamptonshire in 1800, apart from the crossing of the River Great Ouse, the section of canal from Blisworth to the lower end of Stoke Bruerne locks
Bruce Tunnel Savernake Forest which is open to the public with footpaths, drives and picnic sites, hence the tunnel is also sometimes known as the Savernake Tunnel. The main Paddington to Penzance 'Berks and Hants' railway line crosses the tunnel diagonally; both portals can be seen from the windows of passing trains with the canal running close to the railway at each end. Bruce Tunnel The Bruce Tunnel is on the summit pound of the Kennet and Avon Canal between Wootton Top Lock and Crofton Locks in Wiltshire, England. This is the only tunnel on the canal and it is 502 yards