Grand Junction Canal Nene at Northampton, to the turnpike road at Old Stratford (north-west of the modern Milton Keynes), and to Watford in Hertfordshire: those to Daventry and Watford were not built. The branch to Old Stratford was amended before it was built (see below). The branch to Northampton was delayed as the plans of the Leicestershire and Northamptonshire Union Canal to reach Northampton and thus join with the Grand Junction came to nothing. The link to Northampton was made by a tramroad transferred from Blisworth Tunnel, with the 5-mile (8-kilometre) canal from Gayton being opened in 1815. The link to Leicester was
Blisworth opened on 21 May 1991. The by-pass runs to the west of the two villages, now following a newly created route from Tiffield. The road joins the M1 London to Yorkshire motorway at a new junction created at that time, 15A, at West Hunsbury, Northampton. From Northampton to Blisworth the by-pass closely follows the trackbed of the Blisworth to Northampton railway, long since closed. The new road makes a slight detour near the Northampton arm of the canal at the 'staircase' of locks near Rothersthorpe. The road's construction followed many years of long campaigns in the two villages. The London