> I mistakenly introduced errors in this edit

Not really - if there is a gap in the trail (or we can't see where it goes) then there should be a gap in OSM, and if the WVW website isn't directly usable then for now we can only go with what is signed (or not) on the ground (specifically here in Symond's Yat East itself).
My recollection of the WVW (from further west) is that signage is very variable.
The email of the https://www.wyevalleywalk.org/ site suggests that it's part of the AONB, so the route might be available from them as OGL unencumbered by the OS mapping they've overlaid it on on their site.
Anyone feeling keen could ask (although if it was me, I'd probably think that was too much like hard work and stick to mapping the signposts!)