From the end of the M50 continue on the A40 on the Ross by-pass to Wilton.
At the roundabout take the A49 to Hereford through Bridstow and Peterstow, then turn left for Abergavenny (B4521).
At the crossroads about half a mile ahead turn left onto the A4137 towards Symonds Yat and Monmouth, then first right after a mile at Biddlestone Orchards.
Sign says Langstone 1, Llangarron 2.
Proceed down hill, then pass double gates and cattle grid on left; do not enter there. The farmhouse is on the left with converted barns around the junction.