Here's a venn diagram that may help: https://commons.wikimedia.org/wiki/File:British_Isles_Venn_Diagram-en.png https://commons.wikimedia.org/wiki/File:British_

Here's a venn diagram that may help: https://commons.wikimedia.org/wiki/File:British_Isles_Venn_Diagram-en.png https://commons.wikimedia.org/wiki/File:British_Isles_Venn_D... The green circles are each a single island. The yellow circle are a bunch of islands.