I'd like to propose one that only angers & upsets tory euro-sceptics, extreme irish republicans and the right wing generally.
The Northwestern European Isles (NEI) we could even add Iceland and Fero Islands
As it stands:
British Isles - Geographic Identity
anything else is a political / national identity.
Spain has a similar situation to the UK with various national identities all stuck together under one banner "Spain".
(Republic of Ireland excluded from that comparision)