Leave M4 Motorway at Junction 34, you can follow the signs for Llanerch Vineyard.  Take first exit off roundabout if coming from Cardiff direction.   Take third exit off roundabout if coming from Swansea direction.  Take an immediate right.  Follow road for about half a mile and you will then see SLOW written on the road, take the next right Follow the lane for approximately half a mile, you will go past a large white house where the road will bear to the right at right angles.  You will then pass a row of houses. The entrance to Hensol Castle Conference Centre is on the left immediately after the row of houses. Follow road to the top and turn right at crossroads for car parks.