Although the ticketing and aircraft were in BA house-style, the flight was operated by Logan Air, "Scotland's airline", with its main hub at Glasgow. They fly the islands of Scotland and have this odd route from Glasgow to Derry/Londonderry to Dublin and back. So the cabin crew was a cheerful lady from Scotland.
Alcoholic drinks had to be paid for. There was some discussion about currency. Based out of Glasgow, the cheerful Scottish lady had a clear preference for pounds sterling.
Sitting behind me were an elderly, genteel couple from the area of our destination. They were having a whispered conversation about paying for the drinks and I overheard Euro being referred to as "Irish Money". That familiar, warm, cosy, ambiguous, homely feeling rolled over me - back in Northern Ireland, centre of its little universe, where "the south", the "Free State" is a foreign land and the Euro, the currency in use from Finland to Spain and from Portugal to the Polish border, is "Irish money".