This is wildly incorrect. As of Dec 2019, there were 5,000 "unsheltered" / "sleeping rough" people in the UK, population ~65,000,000, according to The Economist (cite: https://www.economist.com/britain/2019/12/18/on-any-one-wint...) which was fewer than the number in San Francisco, population ~800,000 (cite: https://hsh.sfgov.org/wp-content/uploads/2020/01/ExecutiveSu... ).