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
Blisworth the Blisworth Canal Partnership who's aims are to promote, maintain and improve Blisworth's Canal environment. The village is the site of the Blisworth Tunnel of the Grand Union Canal and one of the longest on the English canal system. The tunnel runs south to the nearby village of Stoke Bruerne. The canal runs to the south-west side of the village and a bridge carries the main road though the village. The bridge is partly original, partly widened, as the main road carried the A43 trunk road until a by-pass was constructed. The A43 (Northampton-Oxford) Milton Malsor and Blisworth by-pass was