By Ali Lyon Reform UK leader Nigel Farage has threatened to sue the company responsible for vetting Reform UK’s candidates, accusing the firm of “stitching up” his party. Reform UK claims to have paid Vetting.com £144,000 in April to weed out prospective candidates with extremist views and far-right connections by going through their social media accounts. But the general election campaign has already revealed a litany of instances in which Reform UK candidates have been found to have connections to—or voiced support for—far-right movements. Last week it was revealed that nearly one in 10 of t…