A new referendum held before the previous one has been enacted, in order to judge it, is ridiculous. But we all understand it's the only hope those who wish to destroy the enactment of the last referendum, has.
But no one is going to waste money, find the extra time in indecision, nor make the country more split than it already is, pandering to that undemocratic desire. If leave won by the same amount again the 2nd referendum would have been pointless, if the leave vote increased it still wouldn't silence the dissenters who can't get behind their country's previous decision, and if by some fluke, the fear stories resulted in a remain win it'd then be 'one each' and a worst state than we presently are, but with out nation looking like idiots to the rest of the world having made a good decision, spent years trying to progress it, then getting cold feet and vacillating. So forget this nonsense about there being anything beneficial about an EU style "wrong answer, vote again" demand.