Public records confirm that UK nationals did work for the European Commission around the relevant period: the UK Parliament reported 1,162 UK nationals employed by the Commission in April 2011, and the Commission says its staff are part of the European civil service. (questions-statements.parliament.uk) But the specific allegation that these people were "fanatics" who "hate this country" is a claim about private beliefs and motives, which public sources cannot verify or falsify. (commission.europa.eu) Sources: UK Parliament, "European Commission: British Nationality"; European Commission, "Commission staff".