It would appear that safe routes are only their if the three towns of Bradford upon Avon, Trowbridge and Westbury (finish) are used.
Any thoughts??
I've not much idea about Melksham, but I'm sure there is/was a path between Westbury and Warminster along the edge of the escarpment.
We used to use it for the Matravers sponsored walk. The Westbury end being alongside the quarry, and the Warminster end by the golf course. Maybe Andy, CC or Topskills can remember more than me and fill in the rest....