Britons need to proclaim their rights as indigenous peoples.
Ironically, the Scots, Welsh, Cornish, Manx, and Irish are considered "indigenous peoples" by the Left and their nationalism lauded. It's been mostly the alien Saxon who has been fed a steady diet of self-hatred in the UK.
It's going to be interesting to see what happens when the irresistible force of Third World nationalism bangs against the immovable object of "indigenous" Celtic nationalism.