In reply to drew.c:
This was the reply from the St Agnes museum.
I made some enquiries and have come up with some ideas, but not really
conclusive. Your idea of going on Facebook might be more fruitful.
The two most definite are that the swimming pool is not at Porthtowan,
although to me it doesn't look like a pool, more an inlet. The other
point is that the harbour is not Portreath.
The cliffs might be west Cornwall, but one idea is that they may be
Scottish. With that regard, I notice that the car registration, GX
8229, is a Glasgow number from 1932. A look at the DVLA site shows that
the number still exists on a 1932 Riley, colour green, although it
hasn't been taxed for sometime. It might mean that the car is a
restoration project. I don't know how far you would get by contacting
the DVLA.
Sorry not to be more helpful, but if anything more positive emerges,
we'll be in touch.