I joined Paul and Christine for a cruise on narrowboat Waterway Routes from Gainsborough on the River Trent and up the navigable length of the Chesterfield Canal, to help in filming for their Chesterfield Canal DVD in their excellent series of waterway DVDs. Later, I went round to the far side of the derelict Norwood Tunnel for a walk up the canal past the sites of locks 7 to 19 as far as the western tunnel mouth. Hopefully one day I will be able to travel this way by boat.