Thanks for the above info; seems I should explore the falls above Cheung Sha some time – maybe before strolling the beach and meal at or by the Stoep.
Perhaps of interest for others reading this thread: there’s also a good waterfall south of Tai O. Walk south along coastal trail to Yi O (small bay), then look for a small path leading uphill – goes to bottom of a good fall, which can seem a secret place.
Martin