William Hague and David Cameron have defended plans to give English MPs the final say over income tax and other policies as “vital” to holding the United Kingdom together.
The Prime Minister said there was a “basic constitutional unfairness” about Scottish politicians being able to decide on issues that did not affect their constituents.
The comments came as Mr Cameron launched the Tories’ English manifesto at an event in Lincoln alongside Cabinet colleague Mr Hague.
An English manifesto highlighted commitments to each region, including developing northern train services for Yorkshire and scrapping pacer trains as well as promising further job creation.
The PM said: “English MPs will be unable to vote on the income tax paid by people in Aberdeen and Edinburgh while Scottish MPs are able to vote on the tax you pay in Birmingham or Canterbury or Leeds.
“It is simply unfair. And with English votes for English laws we will put it right.”
Mr Hague said the proposals meant English MPs would have an “effective veto” on measures that only affect their constituents.
“The current situation is manifestly unfair, undemocratic and unsustainable,” he said.
SNP leader Nicola Sturgeon accused Mr Cameron of a direct breach of the post-referendum promise of more powers for Scotland with his English-only manifesto, especially on plans to give English MPs the final say on income tax rates south of the border.