Subregions- Austria
 - Austria region
 - Baltic Sea
 - Bay of Biscay
 - Belgium
 - Bristol Channel region, United Kingdom
 - Channel Islands region, United Kingdom
 - Czech Republic
 - Denmark
 - England, United Kingdom
 - France
 - France-Germany border region
 - Germany
 - Gotland, Sweden
 - Hungary
 - Ireland
 - Irish Sea
 - Liechtenstein
 - Luxembourg
 - northern Ireland, United Kingdom region
 - northern Italy
 - North Sea
 - Orkney Islands region, United Kingdom
 - Poland
 - Poland-Belarus border region
 - Poland-Belarus-Ukraine border region
 - Poland-Ukraine border region
 - Scotland-England region, United Kingdom
 - Scotland, United Kingdom
 - Shetland Islands region, United Kingdom
 - Slovakia
 - southern Norway
 - Sweden
 - Switzerland
 - The Netherlands
 - United Kingdom
 - Wales-England region, United Kingdom
 - Wales region, United Kingdom
 - Wales, United Kingdom

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