NorthSouth
West Wales Radar's primary role is to support unmanned aircraft flying at West Wales. To do this it manages D202 and as necessary others in the D202 complex, it also has the authority to manage D201 for unmanned aircraft flying, subject to MOD Aberporth not requiring to use it (which is quite a frequent occurrence).
West Wales Airport is not "full of UAV activity" and regularly handles manned aircraft flights. I can recommend flying in there, a good bunch of guys running the airport and the AFIS who will bend over backwards to accommodate you. Just ring on the day of intended flight, they'll tell you if unmanned aircraft flying is planned, and if so give you a time which should avoid, or at least minimise any delay. I have never been refused permission to use the aerodrome.
Rule of thumb is that if a UAV is airborne and working either Aberporth or West Wales Radar, an entry into/out of D202 is given if the UAV is above about 3000 FT.