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.
The dial is to the east of the terrace, set on a cylindrical stone column. It used to be at the same site but on a much taller pillar. North and south gnomons are still attached, and there are possible hour lines on the west face.