Tory leader David Cameron vowed today that he would treat Scotland with "respect" if he became Prime Minister.

Tory leader David Cameron vowed today that he would treat Scotland with "respect" if he became Prime Minister.

And he announced a range of reforms aimed at making devolution work better.

These would include regular visits by Westminster ministers to the Scottish Parliament if the Tories win the next General Election.

Mr Cameron pledged that if he became Prime Minister - and if the Scottish Parliament agreed - he would come to Holyrood once a year to face questions from MSPs on any subject.

In a fierce attack on Alex Salmond, he said no Conservative MP would be allowed to serve in two Parliaments.

The SNP First Minister is a member of both the Scottish and Westminster Parliaments.

In a public challenge to him, Mr Cameron declared: "Before you talk about MPs fiddling the system, let's have a little look at your record.

"You say you're Scotland's voice in Westminster - well, I haven't heard it very much.

"You take the salary but what do we get?

"An attendance record in the House of Commons and a voting record that is amongst the worst of all Scottish MPs."

Mr Cameron continued: "Alex, you may draw two salaries but you haven't got one leg to stand on."

He said any Tory elected to a second legislature would give up the other seat "at the first available electoral opportunity".

In a direct appeal, he urged Scots not to be tempted to vote for the SNP out of anger at what was happening at Westminster.

"I say this: I know you're angry with Westminster's politicians," said Mr Cameron.

"But a vote for the SNP puts our Union at risk.

"And don't do that, because remember what it's done for us."

With Scottish devolution now 10 years old, Mr Cameron told the Scottish Tories' conference in Perth: "I stand here as leader of the Conservative Party and say loudly and proudly - we support devolution, we back it heart and soul, and we want to make it work for everybody."

If the Tories win the next election, Mr Cameron said one of the first things he would do would be to visit Scotland to see the First Minister.

"And I can announce today that, if I become your Prime Minister, and if the Scottish Parliament so wishes, I will come to Holyrood once a year and answer questions from MSPs on any subject, from Scotland to the wider world," he said.

Treasury ministers from Westminster would attend Holyrood in person to explain the effects for Scotland of the pre-Budget and Budget reports.

And a Tory Scottish Secretary would meet the First Minister each month, and would also explain the implications of the Queen's Speech at the start of the parliamentary session.

And in another challenge to the First Minister, Mr Cameron declared: "I know you've got a plan.

"I know you think a Conservative government at Westminster will ignore what Scotland wants and needs and that you will try and use that to promote your separatist agenda.

"Well, think again."

To loud applause from the Tory faithful, he continued: "Whatever the outcome in Scotland of the next General Election, a Conservative government will govern the whole of the United Kingdom, including Scotland, with respect.

"Whoever is Scotland's First Minister, I would be a Prime Minister who acts on the voice of the Scottish people and works tirelessly for consent and consensus.

"And whenever the precious Union between our two countries is challenged, we, the party of the Union, will respond by defending it with every bone in our body."