That "61%" is probably about right for what would you'd get for a two-way referendum between Remain and No Deal, or between Remain and May's Deal, but if you were to repeat the Remain-Leave referendum (which would be an insane thing to do - it was madness the first time), I wouldn't be surprised if Leave would win again, by a narrow margin.
"Well, if you knows of a better 'ole go to it"?