The SNP believes in the pooling and sharing of resources and risk across the UK when it comes to the state pension, the Prime Minister has claimed.

David Cameron said not a single Scottish MP had argued for it to be devolved during the extensive Commons debates on the Scotland Bill.

He told MPs during Prime Minister's Questions: "I notice none of Scotland's 59 MPs are arguing that the state pension should be devolved.

"In other words the principle of pooling and sharing our resources and risks across the UK, which I believe in as leader of the UK, is apparently shared by the SNP."

He picked up on the point, also made yesterday by Scottish Secretary David Mundell during day three of the committee stage of the bill, in response to SNP Westminster group leader Angus Robertson who raised the issue of English votes for English laws.

The Moray MP said: "Because of the way the UK is structured, decisions on health, education and much English legislation has an impact on the Scottish budget.

"Will you confirm you plan to exclude Scottish MPs from parts of the democratic process at Westminster that will have an impact on Scotland?"

Mr Cameron replied: "English MPs are entirely excluded from any discussion of Scottish health or Scottish housing or Scottish education.

"What we are proposing is absolutely a very measured and sensible step which says that when there is a bill that only affects, for instance England, committee stage should be of English MPs, but then the whole House will vote at report stage and indeed at third reading stage.

"What this is going to introduce as it were is a system for making sure the wishes of English MPs can't be overruled. That, I think, is only fair in a system when the Scottish Parliament and the Welsh Parliament and indeed the Northern Ireland Parliament have increased powers."

Mr Robertson hit back: "On overruling MPs, that's very interesting because on the Scotland Bill, 58 of 59 Scottish MPs have voted for that legislation to be strengthened and they have been outvoted by English MPs.

"Not content with outvoting Scottish MPs elected on a mandate to strengthen the Scotland Bill, you are now going to introduce second-class status for us as MPs elected from Scotland on issues which can impact on the Scottish budget.

"You are even planning to make the membership of the Scottish Affairs Select Committee a minority pursuit for Scottish MPs. Is this what you mean when you say the respect agenda?"

Mr Cameron replied: "Isn't it interesting you object to a vote in the UK Parliament on a UK issue, which is what has happened?"

He then repeated his appeal from last week's session for the SNP to reveal how they will use the additional powers, accusing the party of only being concerned with process.

The Tory leader added: "I notice none of Scotland's 59 MPs are arguing that the state pension should be devolved. In other words the principle of pooling and sharing our resources and risks across the UK, which I believe in as leader of the UK, is apparently shared by the SNP."

Yesterday, Commons Speaker John Bercow insisted he had received no formal notification from the Government over its intention to bring forward plans to restrict Scottish MPs' voting rights.

Mr Robertson asked him if the Government had informed him that proposals would be introduced in the chamber this week.

He cited a Daily Telegraph report which quoted "senior Government sources" as suggesting plans to give English MPs a veto on English-only laws could be revealed tomorrow (Thursday) and become law before the summer.

Last month, Leader of the Commons Chris Grayling confirmed the reforms would go ahead without new laws - by a change to the standing orders which govern how the Commons works - if MPs vote for them.

The SNP has argued something so "constitutionally important" should be discussed and scrutinised properly via legislation.