Travel along the A40 from Brecon towards Llandovery. About a mile after passing through the village of Sennybridge and after the bends under the trees turn right at the ‘triangle’ where it says ‘No Entry For MOD Vehicles’. Go about 100 yards and turn left. Go about 1/4 mile and turn left down a steep track to the farm. There is a sign by the track that says ‘Gilfach’.
Do not put ‘Gilfach’ into a sat nav! There is a village called Gilfach a long way from here! Do use the postcode LD3 8TY, but note that on Google maps and some sat navs this will take you to my neighbour. Gilfach is down the steep track about 1/4 mile before my neighbour.