Follow the A55 across Anglesey leaving at the junction sign posted Valley. Follow the sign posts to Valley and at the first set of traffic lights, turn left, sign posted Trearddur Bay and Four Mile Bridge. Continue for approximately 2 miles over Valley railway crossing, a small roundabout and finally a bridge over the estuary and turn left shortly afterwards, sign posted to Rhoscolyn. Continue for approximately one mile and after an S bend there is a left turning signposted Silver Bay Holiday Park. Take this turn and follow this road for half a mile. Eventually you will start to go over a series of sleeping policemen. The road will bend left and then right and open out with a large grassed area to the left. Just before you reach Silver Bay, Plas Diwedd is the end house on the right.