with 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. Features References External links Blisworth Images - A compilation of archival and modern photographs recorded since c. 1880 and a collection of articles on both the heritage and the history of the village. Canal tunnels in England Buildings and structures in Northamptonshire Canals in Northamptonshire Tunnels in Northamptonshire Tunnels completed in 1805 1805 establishments in England