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 railway line remains, electrified in the 1960s and is now part of the West Coast Main Line running 125 mph trains from London Euston to Glasgow. The Northampton Loop of the line leaves the main line at Roade, north of Roade cutting and just south of Blisworth, taking trains on into Northampton and further north to re-join the main line at Rugby. The Stratford-upon-Avon and Midland Junction Railway ran from Blisworth station south to , Banbury and but closed in the 1960s. Much of the infrastructure such as cuttings and bridges remain along the route. During the nineteenth and twentieth