How the vote % would split if the LDs alone promised a 2nd EU Referendum (YouGov)

Question wording: "Imagine that Parliament would NOT vote in favour of Brexit, and that there was instead an early general election. The Conservative party is led by Theresa May, Labour by Jeremy Corbyn, the Liberal Democrats by Tim Farron and UKIP by Paul Nuttall. Imagine that the Conservative party, Labour and UKIP all promised to go ahead with Britain leaving the European Union, and the Liberal Democrats promised to hold a new referendum on EU membership. How would you then vote?"