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 was formerly on the Tower but moved to its current position over the southh in 1874/76. Shows 6am to 6pm in hours, halves and quarters. Hours & half hours are marked by full length lines to a large semicircle at the gnomon root. Half hours also marked in chapter ring by dots. Small inner scale marks quarters. 10am line incorrectly extends to a dot. Some Roman numerals not best placed for clarity and some lines are not entirely symmetric about the noon line. Is delineation suspect or does the dial decline very slightly? Uniquely of all lines, the horizon line (such as it is) doesn’t pass through gnomon root.
