I live in Bridgend, and the most useful airfield is Cardiff (Rhoose). If you give Cardiff Wales flying club a call on 01446 710000 they can give you any details that you need. Rhoose is about 25 minutes drive from Bridgend. If you wanted a smaller, cheaper airfield then try Swansea. Be careful though - I believe that it is closed on 1 day of the week, and is an absolute ****** to get to (about an hour from Bridgend)