This seems a poor article for not mentioning the St Patrick’s Cross - one of the flags “making up” the Union Flag / Union Jack, representing Ireland. It’s contentious, but arguably significantly less so than the Ulster Banner.
This comment should be at the top. If someone had asked me, who grew up in the Republic, what the Northern Irish flag was that would have been my answer.
I’m actually struggling to understand the article because the Ulster Flag is used to represent Northern Ireland in pretty much every kind of context. Whether or not Northern Ireland is technically a country or province is irrelevant and just semantics.
If you look at golf Rory McIlroy’s name appears beside the Ulster Flag. In the commonwealth games it’s the same.