Conservative Party leadership candidate Boris Johnson was heckled during a hustings event in Cheltenham as he tried to defend his involvement in the resignation of former UK ambassador to the US Sir Kim Darroch. Mr Johnson's lack of explicit support for the envoy in Tuesday's TV leadership debate following a tirade of abuse from US President Donald Trump was widely seen as the final straw in his decision to quit. Report by Blairm. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn