We have a duty towards our allies
Australians and New Zealanders whose parents and grandparents have died for us in WWI and II now find it harder to enter the UK than members of the EU who we/they were fighting against. Australiasians (and Canadians..) deserve at least equivalent treatment as members of those EU countries that their parents and grandparents were fighting against. And… the British have a lot more in common with Australiasians than, say, Eastern Europeans..
I am not a right wing activist – but this situation seems morally wrong.