Written by DiveJourney. Built from public sources and local operator knowledge. Last updated Dec 7, 2025.

• DiveJourney - United Kingdom (spots index) - Internal spot list used for linking signature sites and examples.
• Cefas Coastal Temperature Network - Plymouth station (monthly means) - Monthly mean sea-surface temperature reference for South West England.
• Met Office - Sea temperature and cold water safety - Background on UK sea temperatures and cold-water risk.
• BSH - The North Sea in 2023 (sea surface temperature context) - Seasonal temperature context for the North Sea.
• GOV.UK - Get an electronic travel authorisation (ETA) - Official ETA overview and cost.
• Home Office media blog - ETA factsheet (November 2025) - ETA validity and application channel details.
• GOV.UK - Check if you need a UK visa - Official visa and ETA check tool.
• JNCC - UK Marine Protected Areas overview - National-level overview of UK marine protected area designations.
• GOV.UK - Marine Conservation Zones (England) - Information on MCZ designations and related management in England.
• Historic England - Protected Wreck Sites - Protected wreck concept and licensing references for England.
• Legislation - Protection of Wrecks Act 1973 - Legal basis for designated wreck restrictions and licensing.
• VisitBritain - Visa and immigration information - Tourism-facing summary of UK entry requirements.