BRIDOL is the British Sundial Society's Register of Fixed and Mass Dials, which gives detail and photographs of about 8000 fixed sundials and 3000 mass dials in the UK.
Some of these are in private gardens, but the majority are publicly available.
5-ring armillary sphere with arrow gnomon (pointing downwards).
Baluster pedestal set on millstone within ring of edge-on tiles, and 16 segmental flagstones.