The public record shows that this line was spoken in the interview transcript, but that is not enough to verify the underlying factual claim. Whether Nigel Farage was "quite self-centred" in his youth is a subjective characterization, and public sources do not let us independently confirm the interviewer’s internal impression. So this is not publicly verifiable from available evidence. Sources: High Profiles interview transcript, "Nigel Farage" (https://highprofiles.info/interview/nigel-farage/).