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
Norwood Tunnel minimal boat-traffic on the declining canal the cost of repairing the fall could not be justified and the tunnel has remained blocked ever since, splitting the Chesterfield Canal into two sections. The Chesterfield Canal has been restored as far as the Eastern Portal of the Norwood Tunnel largely through the efforts of Chesterfield Canal Trust. Part of the canal West of the tunnel from Chesterfield to Staveley has also been restored. Further restoration is proceeding. Current plans for the tunnel include the opening up of the tunnel in the Kiveton Park area, creating a cutting followed by the restoration of