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
Berwick Tunnel byelaw was introduced which stated that whoever reached the centre first should continue, whilst the other boat would have to turn back. Today the canal is disused, and the tunnel remains, though the ends have been bricked up. Berwick Tunnel Berwick Tunnel is a canal tunnel located on the Shrewsbury Canal, Shropshire, England, UK. The Shrewsbury Canal connected Shrewsbury to the Wombridge Canal, and provided a way to supply the people of Shrewsbury with coal at reasonable prices. The route between Shrewsbury and Wappenshall was relatively flat, although beyond Wappenshall, nine locks and a large inclined plane were needed to