Haven't been to Southport in years so don't know if there's any flying there anymore. Use to go regularly as there were relatives there, don't think I ever saw the tide in!!!!
The beach was always very firm.
I also remember GADDI DH Dragon pleasure flying out of Blackpool. I flew in this later when it was operated by Chris Roberts (I think). I believe this is still around in the US (N34DH).