Apologies for the delay in replying but a pal borrowed ma laptop for a few days. shazbang, Great Britain is part of the UK as is Northern Ireland. The nationality of Citizens of the UK is British so that is why Loyalists and Unionists call themselves British. As for you having an Irish passport, it is up to the government of the Republic of Ireland and that country's parliament to decide the conditions under which a passport can be issued. Until 1999, that country's Constitution laid claim to Northern Ireland so it is no wonder they allow those born there to claim citizenship of the Republic of Ireland.