Visited on 7.2.10. Knocked at farm door to ask permission to see stone. Owner refused but suggested I come back in the summer and ask again! There didn't appear to be any easy way to 'sneak' a look due to the position of the farmhouse. (Will report back when I next visit)
Good post - we too had problems getting access to the site a few months back. 'Polite, but firm' is the phrase I think that best describes the fellow's manner. However, other friends have secured entry without any problem, so maybe it's just 'one of those places'.
A40 from Brecon travelling east to Abergavenny
At the hamlet of Llansantffraed (church which spire) turn right for Talybont.
Bridge over river Usk.
200m, turning on right for Gilestone Camping and Caravanning.
Proceed to farmhouse to ask for permission.
‘Prehistoric sites of Breconshire’, Children and Nash, Logaston Pr, gives the name of this monument as: Llwyn y Fedwen.
This is as far as I got as the landowner said no, but to come back another day.
A friend recently e-mailed them and they said it was no problem with access. So it’s worth a try.
Gilestone, is one of a several standing stones which follow the route of the river Usk. Most stones are large and on the northern bank, but this one (though large) is on the southern one
Measurements given for the stone are as follows: Height 2.97. Breadth 2.44m. Thickness 1.37m