I understand you swim fairly regularly in the sea in the Hayling Island area? I don't know whether you ever go on the RALSA website, but on the comments page, a lady called Kate Davies is interested in finding like-minded souls to go wild swimming. She lives in the Southsea area, which I believe is not that far away, geographically. I don't know whether you are in a position to help her, but I thought perhaps you might be able to advise her?
All the best,
David aka Dave_G Katedavies55@hotmail.com