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
Bruce Tunnel stone, each with a decorative plaque of Pennant stone. Construction was begun in 1806 and finished in 1809. It is lined with English bond brickwork and has a wide bore to cope with the 'Newbury Barges' used on this canal. There is no towpath through the tunnel, so walkers and cyclists must walk across the top of the hill. When canal boats were still pulled by horses, the boatmen had to haul boats through the tunnel by hand, pulling on chains that ran along the inside walls. The tunnel is about northeast of Burbage village. To the north lies the