British people have 'every right' to reverse Brexit in second referendum, John Major says

John Major has said the British people have “every right” to reconsider Brexit in a second referendum as he broke his silence on the state of the negotiations with Brussels in a major intervention.
The former Prime Minister also launched a furious attack on the ultra-Brexiteers in the Conservative Party adding that pre-referendum promises were “wrong“ and described the £350m promise for the NHS after Brexit as a “ridiculous phantom”. 
Speaking in central London Sir John, who led the Conservative Party between 1990 and 1997, said Theresa May should offer Mps in the Commons a free vote on the final deal, with the option of putting it to the public in a second referendum.
“Many electors know they were misled,” he said. “Many more are beginning to realise it. So, the electorate has every right to reconsider their decision.”
He concluded his speech by adding: “By 2021, after the likely two-year transition, it will be five years since the 2016 referendum.  The electorate will have changed.  Some voters will have left us.  Many new voters will be enfranchised.  Others may have changed their mind.  
“No-one can truly know what “the will of the people” may then be.  So, let Parliament decide.  Or put the issue back to the people.”
Sir John called on Mrs May to stand up to the “ultra-Brexit” minority in her party and drop her “red lines” of taking Britain out of the single market and customs union.
The red lines were opposed by a majority in both Houses of Parliament and had “boxed the Government into a corner” in negotiations, making a favourable outcome “impossible”, he said.
Warning that the Government's negotiating position was not realistic, he urged the Prime Minister to be prepared to “change course” and seek a Norway-style solution which would involve accepting single market rules and paying for access to EU markets.
It was “not credible” to expect to leave the single market, customs union and European Court of Justice while at the same time seeking a-la-carte access to European markets, he said.
He warned: “Unrealistic aspirations are usually followed by retreat. That is a lesson for the negotiations to come.
“They will be the most difficult any Government has faced. Our aims have to be realistic. I am not sure they yet are.”