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 combination incorporates an equatorial dial disc and a horizontal dial below it, the gnomon of the latter doubling as gnomon for the winter surface of the former. The main dial is a very substantial circular disc of Stoke Hill weatherbed Bath limestone, with a crest of the Acland memorials at the top and a 25mm stainless steel rod gnomon protruding about 100mm. It has full hour lines and short half-hour marks inscribed on its upper (summer) surface, with Arabic hour numerals for 4am to 8pm, and a smaller similar set on the lower end of the winter surface. The horizontal dial is a square stainless steel plate with hour lines, set in a square base of Welsh blue/black slate, also showing 4am to 8pm with Arabic numerals. A dedication plate bears the equation of time with longitude correction included. The stone disc was carved by National Trust mason John Salter at Montacute House.
