Hi Paul
I live in West Sussex, I'm sure that they run fast electric at Eastbourne, there is a millenium boat pool at Crowborough if it's big enough, that's by the sport complex and model railway, not certain if there is a club running there or not, or if it's just there for any casual user. There is a club in Crowborough, try the library, I know they sometimes attend a weekend show, Laughton Country Fayre.
(
www.heritagefield.co.uk) This site is used twice a year, I always attend the September show, but I'm busy preparing for the Alfold Charity Boat Show (
www.alfoldboatshow.co.uk) when the May show is on.
Hope this is of help to you
Alan