A very frequent question when planning an E2E is the route in the far south-west.  The main A30 through Cornwall & Devon (or Devon & Cornwall for JOGLE) is notorious - much of it is motorway in all but name yet cyclists may ride on it.

The content here has suggestions for a route from Land's End as far as Tiverton Parkway, with a supplementary route avoiding the A30.

MickF* from the CTC Forum has kindly created both .gpx and .pdf map files for viewing or download (the coloured routes on the map are the separate files)

Click the link - the .gpx files will open a download window and the .pdf files will open the map in a new window (the file can then be saved)
The .gpx files can, of course, be reversed to load into GPS gadgets

.gpx files

Route 1 :  Land's End - Three Burrows
Route 2 :  Three Burrrows - Hallworthy
Route 3 :  Hallworthy - Okehampton
Route 4 :  Okehampton - Tiverton Parkway

Avoid A30 : Three Burrows - St Columb Major

.pdf maps

Route 1 :  Land's End - Three Burrows
Route 2 :  Three Burrrows - Hallworthy
Route 3 :  Hallworthy - Okehampton
Route 4 :  Okehampton - Tiverton Parkway

Avoid A30 : Three Burrows - St Columb Major

All the .gpx and/or .pdf files are provided free of charge in good faith, without warranty and are for personal use only.

* Mick, who lives in Cornwall, is a mutiple End-to-Ender, including a ride on a Raleigh Chopper towing a trailer.