Ok, India and Africa then, they returned to their former owners. Ireland has been separate from Britain for thousands of years and has been inhabited by Celts for much of it. England invaded Ireland and colonised it in the last thousand years...
Plantations of Ireland
"Although England trailed behind other European powers in establishing overseas colonies, it had been engaged during the 16th century in the settlement of Ireland with Protestants from England and Scotland, drawing on precedents dating back to the Norman invasion of Ireland in 1169."
Do you believe that we should still govern India?
Northern Ireland has only been a country since 1921 after the British Government stitched up the Catholics by claiming only six counties instead of the nine in Ulster designed to give the Protestants the majority in the newly formed Country.
What about the rights of all Ireland's Celts/Catholics?