UK Government plans to introduce English votes for English laws (Evel) in Westminster could see an end to the Barnett Formula, according to constitutional experts yesterday.

Giving evidence at the Scottish Affairs Committee’s inquiry into Evel, senior vice-principal at the University of Edinburgh, Charlie Jeffery, said scrapping the Barnett Formula would be the ultimate conclusion of proceeding with Evel.

“If one were to think seriously and in the round about an institutional representation of England in the UK political system, then you have probably got to get rid of the Barnett Formula,” he said.

“Pretty much every inquiry that has been launched by whatever legislature around the UK in the last 15 years has suggested that the Barnett Formula is problematic.”

He added that Barnett was unique in the world for its methodology of using Westminster spending decisions to calculate how much Scotland should be allocated to spend on its own devolved choices.

“There are two things that you can infer from uniqueness,” he said. “Either it is a brilliant invention that nobody else has ever come up with, or it is not necessarily something that is entirely fit for purpose.”

When the committee’s chair suggested Barnett was protected by “the vow”, Jeffrey replied: “I wonder about the constitutional status of the vow.”

It was, he said, just a front page of a newspaper.

Sir William McKay, a former clerk of the House of Commons and chair of the commission on the consequences of devolution for the House of Commons, who was also giving evidence to the committee, said there was a “stronger political need” for Evel “than a practical need.

He also warned that legislating for Evel, rather than amending the standing orders of the House of Commons would be “a dog’s breakfast” and warned that “everybody would be in the courts” if a mistake is made.

Speaking after the debate Dundee MP Chris Law, who sits on the committee, said: “English Votes for English Laws puts forward an absurd solution to the UK’s current constitutional inequalities and it is clear that the proposals need to go right back to the drawing board so that they can be examined properly.”

He continued: “The Tories cannot be oblivious to the flaws of Evel or to the hypocrisy of pursuing these proposals – which would effectively establish an English Parliament within the UK Parliament – after they opposed every single amendment put forward to strengthen the Scotland Bill.”