Head west along the M4 until the end of the motorway. Take the A48 towards Carmarthen. At Carmarthen take the A40 signposted Haverfordwest/ Fishguard.
As you approach Fishguard keep on the A40 signposted Goodwick (also signposted for the ferry) this will take you to the seafront.
Pass the petrol station and Tesco's on your left. At the roundabout go straight across and head up the hill. Immediately after the Hope & Anchor and Rose & Crown pub turn left, then left again into Main Street, Celtic House is on the left next to the Post Office.