Reform UK to announce new policies and candidates at Doncaster rally

Far-right party trying to capitalise on third-place byelection finishes and is vetting prospective MPs' social media output

Reform UK will seek to capitalise on its momentum in the polls and third-place finishes in two recent byelections by launching new policies and new candidates at a rally in Doncaster on Saturday.

After the havoc wreaked on Ukip and the Brexit party by candidates who had to be suspended over racist and offensive comments, a vetting team at the rightwing populist party is trawling through would-be MPs' past social media output.