Britain and Ireland are the main ones, followed by (not sure if all of them)
around The UK:
Shetland
Orkney
Outer and Inner Hebrides
Wight
Sheppey
Hayling
Anglesey
Greece:
Crete
Lesbos
Rhodes
Chios
In the Atlantic close to Europe:
Azores
Canary Islands
Faroe Islands
Iceland
Greenland
Danish and Swedish Islands:
Bornholm
Zealand
Lolland
Gotland
Orust
Mediterranean:
Sicily
Sardinia
Malta
Elba
Corsica
Balearic Islands
St. Paul's Island
Greece:
Crete
Lesbos
Rhodes
Chios
Hope this helped.