Failed fieldnotes
‘Prehistoric sites of Breconshire’, Children and Nash, Logaston Pr, states that permission to visit this long barrow is obtained from Trevithel Farm. It isn’t, the site is on land owned by Pipton Farm.
When I got there no one was in, but this is how you get to Pipton farm:
A479 at Three Cocks take the A4079 to Builth Wells.
Less than 1km, on the right is Pipton farm.