Grand Union Canal: Northampton to the Thames: South ("Waterways World" Canal Guides) A guide to over 100 miles of canal from Limehouse in London to Northampton. It provides advice on using canals, covering locks, tunnels, swing bridges, speeds and mooring, along with mileage and lockage charts. It covers the history of the canal and features a complete route planning map, a full colour map of the entire length of the canal, detailed route and navigation descriptions, and information on the facilities on or near to the canal.