A group of British expatriates in France, Italy and Spain is seeking judicial review against the prime minister Theresa May in a bid to stop Brexit. The UK in EU Challenge group submitted their application to the High Court this week, arguing that the Electoral Commission’s ruling last month that the BeLeave campaigns spent £675,000, which should have been declared, invalidates the 2016 referendum result. The group, represented by Croft Solicitors, contend that the decision to trigger Art 50 was based on a factual error, namely that the referendum was based on a lawful, free and fair vote. The government has countered that the application is out of time and that a similar challenge has already been dismissed.