https://www.mapthepaths.org.uk/ is a project to add all the rights of way and permissive paths in England and Wales to OpenStreetMap, fully tagged.
It contains council data of paths that can be cross-referenced with current OSM data. Parts that are missing are then added to OSM by volunteers.
It's important to add these routes to the database! If you can contribute time drawing lines, it would be appreciated. I'm happy to help advise or get you started if you're new, and there's also the wider OSM community who are always happy to assist.
Generalist Hometown instance with a strong focus on community standards. No TERF, no SWERF, no Nazi, no Centrist.