Grumpy was spot on! The EU way of doing things is to have referendums until such time as they get the answer they want - then shut down the system!
What do you, @GrumpyWasTooCheerful, @AfghanAndy, @Tired_Tech and @LeoRoverman have to fear from a 2nd referendum? If those who voted leave in the 2016 referendum still believe they've made the right choice, the previously undecided/ambivalent are better informed and energised about the consequences of the vote, and as many remainers as some believe have become bloody-minded and just want it all to go away, then the result of a 2nd referendum, once the leave end-state has been defined and explained, should be a shoo-in, with such a crushing majority that the result would leave no-one in doubt as to the (informed) will of the people.
Please don't use the call of undermining Parliament as a reason for not having a 2nd referendum; the current muppets on both sides of the House have already done that in spades without the need for any possible interference from Brussels, Moscow, DC or Dublin.