Thanks for the interesting suggestions everybody... I particularly like the idea of Ostende. Piltdown Man - whilst that sounds like a remarkable journey, I think it may be something more suited to when I have an aircraft of my own, so I can live without the pressures of meeting so many hours of flying per day, and having the aircraft back on time, which can not always be guaranteed due to weather.
I forgot to mention, somewhere with a nice, quiet, sandy beach would be perfect as well - I hear that Caenarfon can satisfy this somewhat?
All ideas gratefully received,
Jack.