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.
There are three circular slate dials, delineated by Frank King, on this unusual triangular obelisk which was designed for the Millennium by the one-time Surveyor Emeritus of Westminster Abbey, Peter Foster.
The top rotates so that the cast figure of Father Time is in permanent pursuit of two children: these three figures were designed and modelled by Sir David Hughes.
The three dials are some two metres from the ground and each bears a gilded gnomon of 1/8" bronze sheet.
[The English Garden, July 2020, page 25, shows what could be a good horizontal dial on a stone baluster pedestal at the focus of the Double Borders. More information requested.]
