68 reef dive sites in United Kingdom.
Biggest areas: England (14), Argyll and Bute (11), Scotland (8), Highland (6) and Northumberland (5).
Recorded maximum depths range from 6 m to 55 m (58 of 68 sites have a depth).
By level: 27 beginner, 5 intermediate, 10 advanced and 6 technical.
Species confirmed at these sites by diver sightings (three or more independent divers) or by two or more independent sources, with the number of sites each is confirmed at.