Blisworth Tunnel sections lined with pre-cast concrete rings. It was also used to test out the materials that were later used on the Channel Tunnel. An unused ring is on display near the south portal. Blisworth Tunnel Blisworth Tunnel is a canal tunnel on the Grand Union Canal in Northamptonshire, England, between the villages of Stoke Bruerne at the southern end and Blisworth at the northern end. The northern end is about from the northern end of the Grand Junction Canal at Braunston, Northamptonshire and the southern end about . At 3,076 yards (2,813m) long it is the third-longest navigable canal tunnel
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