Well Derry/Londonderry is officially called Londonderry, but Irish republicans didn't like the London link so call(ed) it Derry. So during the troubles it was a

Well Derry/Londonderry is officially called Londonderry, but Irish republicans didn't like the London link so call(ed) it Derry. So during the troubles it was a thing to refer to is as Derry/Londonderry.