Ok the fist part is good luck on your own.
Second is a check on UK citizenship residency.
Say (hypothetically of course) A person was born in London in 1973. Both parents are were Australian at the time and legally residing in the UK.
Never renounced UK citzenship, has Sooty and Sweep and Roland Rat records, watched Bleu Peter, hates Mary Whitehouse AND Athur Scargil ect.
Would such a person be able to live in the UK should the Yurp decline into a socialist Greta hell hole?