sorry I don’t understand
Otherwise, to the extent that the pilot and aircraft operator are distinct, a UK-based US-registered non-Annex I (Part-21 in the UK) aircraft can be flown on a US pilot certificate, including one based on a foreign licence, in EASAland by any pilot regardless of residence status.
so are you are saying a uk resident can legally fly a n registered experimental /nonpart21 or aircraft without type data cert in the uk