[rjsw]

The United Kingdom bit comes from joining together the Scottish and English crowns, it wouldn't be affected by whatever happens to Northern Ireland.

[benj111]

Check your passport, it's the United Kingdom of Great Britain and Northern Ireland.

"The medieval conquest and subsequent annexation of Wales by the Kingdom of England, followed by the union between England and Scotland in 1707 to form the Kingdom of Great Britain, and the union in 1801 of Great Britain with the Kingdom of Ireland created the United Kingdom of Great Britain and Ireland."

https://en.m.wikipedia.org/wiki/United_Kingdom