The claim is too subjective and lifelong to verify from public evidence. "Single-minded" is a personal character judgment, and "always" turns it into a claim about his internal disposition across his whole life, which public sources cannot conclusively prove or disprove. The published High Profiles biography shows a varied career path (commodity broker, founder of his own business, then politician), but that does not objectively establish whether he has "always" been single-minded. Sources: High Profiles, "Nigel Farage" interview page (https://highprofiles.info/interview/nigel-farage/). (highprofiles.info)