World Heritage Sites are designated to meet the UK's commitments under the World Heritage Convention. The UK's ratification also extends to its Overseas Territories and Crown Dependencies. These sites are designated for their globally important cultural or natural interest and require appropriate management and protection measures. Natural properties may be terrestrial or marine areas.

SACs in Scotland are designated by Scottish Ministers under the EC Habitats Directive. They are areas which have been identified as best representing the range and variety within the European Union of habitats and (non-bird) species listed on Annexes I and II to the Directive. SACs in terrestrial areas and marine areas out to 12 nautical miles are afforded protection through the Conservation (Natural Habitats, &c.) Regulations 1994 (as amended). Possible Special Areas of Conservation (pSAC) may be subject to change prior to submission.