There are loads of places that will provide a SRA - many fewer a PAR.
In the south you will get an SRA at Southampton, Bournemouth, Gatwick, Farnborough (I think, not asked recently), Manston (when the radar is working) to name a few. The only one I can think that did, that doesnt is Dunsfold, and of the same era Manston when under the control of the RAF it provided a PAR - I remember flying a PAR at Manston before they closed.