WATCH Emily Thornberry mouths at Theresa May during heated Brexit speech

THIS is the moment Emily Thornberry mouthed directly at Theresa May during a heated Brexit speech in the House of Commons. The Prime Minister asked the Labour benches if they were so keen to progress in the Brexit talks why party MEPs voted against doing so. The shadow foreign secretary could not sit still as she reacted to Mrs May’s question on European Union negotiations. Speaking in the Commons, the Prime Minister hit out at Jeremy Corbyn's comments that Labour wanted to move on with EU talks. She said: “If they think it’s so important to move ahead in the negotiations, why did Labour MEPs vote against moving ahead in the negotiations?