While in quarantine at Pendragon Manor in The Moochers Abroad, Fiona, Katherine and Celia often scrambled along the beach, where Katherine also enjoyed surfing. In fact, her surf board is used as a lever to dislodge the huge rock that Celia's leg gets trapped under. They would often come across rock pools like this one.
Pendragon Haven in Cornwall is the setting for The Moochers stories. Like many other places in Jane Shaw, it is a thinly disguised version of a real location: Crackington Haven. The Evans family spent several holidays there and the author used this area of Cornwall as the setting for The Moochers stories, Family Trouble and (as Jean Bell) The Penhallow Mystery. Pendragon Manor is based on Crackington Manor, which is now a guest house.