Possible own goal, sp…
"And how many generations would a family have to be here before they could call themselves British?"
That's just inviting them to think of a number :-
Unless you want them to say something which lets you accuse them of being Woloons, Huguenots, Normans, Vikings, Saxons, Angles, Celts or, in fact anyone who got here since the ice retreated and the land became habitable again.
We are ALL descended from immigrants. The word 'British' might as well mean 'immigrant'.
ISBN 978-1-84529-482-3