The plan was to dump them somewhere between Londonderry and Coleraine where they could fish, so a settlement on Magilligan Point is the most likely candidate for colonization. My previous post about what would happen still stands, but the people of Cantonese Magalligan would likely just get up and migrate to the rest of Britain because of hostility.
On a note, what becomes of Devolution? Will the Cantonese Magallian become it's own Devolved Government, or will it be part of Northern Ireland? Will NI become it's own Devolved Government, or will the hostility against the mass immigration delay it.
You know what, this would be a great TL. I'm not joking, if someone out there could detail the logistics of getting Five Million people to Ulster, the political fallout as a result of this, and the impact it has on culture and geopolitics, that would be amazing.