Jass, thank you for your thoughtful and considered comments.

I have walked many routes in Scotland, England and several other European countries, and contributed to OSM many details from those experiences.

Two years ago I looked at the LEjog gpx files and the resulting route.  As I recall made considerable use of Public Footpaths in England: from a practical viewpoint (mine and others) the Public Footpaths are not realistic for long distance walking.

A long distance walk that has been in my sights for many years has been my version of a Lands End to John O'Groats: my version would connect almost all of my family connections.

A very large part of my route would include existing routes north from from Bristol, with only three in Scotland, for my way to achieve John O'Groats.

In Cornwall and Devon I first considered using the south west coastal path route and added accordingly some year ago.

Last October I spent a week in Cornwall, Devon and Somerset looking at walkable long distance possibilities towards Bristol.

Last week I deleted my earlier efforts using SWCP and made a route through to Exeter for my personal use.

Having obtained the resulting GPX files I have now deleted all of the LGa route details. 

I am aware of the need to map routes that have been reliably published and verified and believe I have complied in other cases.

I hope my explanation fully answers your questions on this matter.

As you appear to have some oversight of walking routes, I have some observations about details for a well established route around London that I walked in October.

These are of a generic nature, using that routes details as an example.

Please advise if I can discuss the generic aspects with you.

Alwyn