Latest #Ramblers magazine has an item on the number of stiles on #PublicRightsOfWay in England and Wales. They used #FreedomofInformation requests, presumably from each Highway Authority, for the data. Grand total comes to around 140,000, or around 1 per mile of PRoW.
#OpenStreetMap has just over 82,000 as of today (#OverpassTurbo query: https://overpass-turbo.eu/s/2cFH). Not all of these will be on public rights of way, but between 50 and 60% of the total isn't bad. (Wales only represents ~5-6%).













