Our research into the rock-cut pools of Cornwall took us (on a distinctly damp day) to the large pool at Trevone. This was made famous recently when it featured in the BBC series of Enid Blyton’s Mallory Towers when some young actresses had to pretend that a distinctly stormy Cornish day was just the time to go swimming in cold water. They carried it off splendidly despite the usual Blytonesque bullying of another girl.

This is one of the larger sea pools around the coast.