Orca Conservation Listings in the UK

Orca found in UK waters are protected under the Wildlife and Countryside Act (1981). They are classified as a Priority Species in the UK Biodiversity Action Plan and are protected under the Conservation Regulations of Northern Ireland (1998).

They are also listed in Appendix II of CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora) - search by genus and species (Orcinus orca): 
http://www.cites.org/eng/resources/species.html

- and in Appendices I and II of CMS (Convention on Migratory Species):
http://www.cms.int/reports/small_cetaceans/data/o_orca/o_orca.htm