Apologies for mucking up an area that you know well. Thank you, also, for pointing out the recent changes. I will be more careful about checking with https://prow-carms.esdm.co.uk/standardmap.aspx for accurate PROWs. I have undone the incorrect routes I put in.

My feeling is that if they are on a definitive map PROWs should be on openstreetmap even if they are challenging to access. I know not everyone shares this view. So for example I would typically mark on the map the PROW 4/9/1 (Pencraig Uchaf to Fron). I will of course leave this to you.

The reason I would do this is that I find it much easier to survey paths and make updates when there is something marked to act as a start point.

Yes that sounds reasonable. Thanks for spotting this.

I surveyed the route south of the A11 in person a few months ago. From memory the southern 2/3 of it is a farm track. The last 1/3 ran along a field up to A11 where there was evidence of a place where pedestrians could cross (as you say ... dangerously). I think the old road may have grown over (would have to check).

Satellite imaging suggests it goes over. Question of how the extension of wellacre quarry has effected the route. I can't find evidence it has been discontinued however. Needs a survey.
Best wishes
Andrew

Thanks for cleaning it up.