Well I think you might be disappointed with Essex. As far as I know there are only two places in Essex - St Osyth Beach near clacton and some naked sun bathing on Two tree island in amounst the long grass. Although the later is mostly men/gay I have heard that there is a few couple that go and that like to put a show on. Two tree island is busy from 11am when the sun is shining - If you want a tip where abouts to go PM me.