Monananig

The OS map has changed a good bit with the new house in the first picture destroying the lane that appears to run up close to it. The barrow itself is about 300mm high by a diameter of maybe 10-15m. There a few stones protruding from it, may be field clearance.
More than likely I would say the barrow is looking along the false horzon to the north-east where the hills are, may be part of the Knockmealdowns, will have to check.