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
Stoke Bruerne public footpaths cross the area around Stoke Bruerne. One such walk, taking in Grafton Regis, was the subject of a "Daily Telegraph" article. Other walks in and around Northampton are mentioned in the County Council Right of way site. The village is home to one of the three museums owned and run by Canal & River Trust. The others are at Ellesmere Port and Gloucester Docks. About half a mile north of the village is the south portal of Blisworth tunnel - accessible by a walk along the old towpath (on the eastern side of the canal - north of