Composite Celtic Nations Sides In Sports

I would love the Celtic nations of Scotland, Wales, Northern Ireland, the Republic of Ireland, Cornwall, the Isle of Man, and Brittany to form a combined composite international side in some sport. Even if it is just a one-off or touring side. It could be a consistent side like the West Indies in cricket. Or a touring side that combines every four years like the British and Irish Lions. There are various sports where individual celtic nations could combine to form a strong side in male or female sport. Be that rugby union, rugby league, cricket, soccer, tennis, gridiron, basketball, baseball, field hockey, ice hockey, golf or other sports.