Most Route Planners and SatNavs will only accept Addresses and Postcodes, not Grid References.  This will help.

 Click on Streetmap
1) Enter the Grid Ref into the Converter selecting LANDRANGER GRID and CONVERT.  This will give an approximate Postcode which can be entered into a Route Planner or Sat Nav to give directions to the Start Point for the Walk
2) CLICK HERE FOR LOCATION will produce a map, which can be printed.