Boris Johnson mercilessly mocked Jeremy Corbyn during the Conservative party's election manifesto launch. The prime minister took swipes at the Labour leader's 'neutral' stance on Brexit saying he couldn't see how Mr Corbyn could "credibly take this country forward or credibly get a deal" when he won't say whether he wants to come out of the European Union or not. Mr Johnson described a possible Corbyn-Sturgeon coalition government as a "nightmare on Downing Street" before adding "let's go carbon-neutral by 2050 and Corbyn-neutral by Christmas". Report by Thomasl. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn