Nigel Farage’s Brexit party is being investigated for allegedly failing to answer requests for data it holds on some voters, according to Sky News.

Party must show how it spent £300,000 on data services in run-up to 2016 vote and 2015 election.

Investigation follows revelations of Lynton Crosby firm running ad campaign calling voters to lobby MPs.

The official Brexit campaign has been fined £40,000 for sending thousands of unsolicited text messages during the 2016 referendum campaign.