Ed Miliband has insisted his only focus in the election is winning a majority in Westminster, rather than doing a deal with the SNP to get into Number 10.

He said there was a "fight on" between his party and David Cameron's Conservatives to determine who would be the prime minister after May's general election.

He said votes in Scotland - where polls suggest Labour could lose dozens of seats to the SNP - would have an "important impact" on the outcome of the election.

But Mr Miliband, who was campaigning in Glasgow, said the only way people could be sure of removing Mr Cameron from Downing Street was to vote for him.

The Labour leader said: "If you want change and you want this Tory government out, the only way to make that happen is to vote Labour.

"A vote for any other party is a risk you don't see the end of a Tory government.

"I do want to make that absolutely clear to people, because the Scottish people have shown time after time their desire to get rid of David Cameron and his government, and there is only one way to do it."

Labour won 41 seats north of the border at the last general election and with polls currently pointing to a hung parliament, Mr Miliband said he is "determined" to retain all of those.

But his party trails Nicola Sturgeon's SNP in polls north of the border and the nationalists could hold the balance of power if no party secures an overall majority.

Mr Miliband said: "The question on the ballot paper, actually I think Nicola Sturgeon said this yesterday, is who is going to be prime minister, is it going to be David Cameron or is it going to be Ed Miliband?

"She herself said that is the question facing the electorate.

"If that is the question facing the electorate, and if people want to get rid of David Cameron and a Tory government, then the right thing to do is to vote Labour at the general election."

He added: "We are determined to win all the seats we hold, that is absolutely right.

"Is there a fight on? Of course there is a fight on. There is a fight on right across the United Kingdom in this general election. Scotland will have an important impact on this general election."

Mr Miliband, who was campaigning with new Scottish leader Jim Murphy and shadow Scottish secretary Margaret Curran, insisted his party was "doing the work on the ground" to succeed in May.

He said: "There are only two outcomes from this general election, a Conservative government or a Labour government, and I'm confident the people of Scotland don't want to see a re-elected Conservative government and want a Labour government."

When asked if he would do a deal with the SNP if Labour fails to secure an overall majority, Mr Miliband said: "I have only one focus, which is a majority Labour government.

"I'm going to put before the British people a manifesto, there will be a separate and distinct Scottish manifesto, which I think is important, and then I will say to people 'I want you to elect a majority Labour government'.

"That is what I think the country needs and that where all of my focus is, that is what all of my energy is on."

Pressed again on the possibility of any deal with the nationalists, he said: "I couldn't be clearer - I think Jim (Murphy) has said we don't need, we don't want and we're not planning for that, and that is my position too."

While Labour won most of the 59 Scottish seat at Westminster in 2010, the party has been out of power at Holyrood since 2007, with the SNP securing an unprecedented overall majority of MSPs in 2011.

"We obviously lost in 2011 and clearly there are some voters who have moved away from us," Mr Miliband said.

Mr Murphy stated: "I've said before that in recent times we haven't been good enough and we haven't been strong enough, and I've said before I take my share of that responsibility.

"But the Scottish Labour Party is beginning a process of change.

"We are determined to lead that change and lead into the general election and contribute to a UK-majority Labour government."

Since becoming Scottish Labour leader in December, Mr Murphy has put forward plans to change the party's constitution north of the border, emphasising his desire to ''put Scotland first''.

The new text states that decisions on devolved policy will be made by the Scottish Labour Party and emphasises a commitment to work ''for the patriotic interest'' of the people of Scotland.

Mr Miliband backed that today, stating: "When it comes to devolved issues in the United Kingdom it is absolutely for Jim to make those decisions, he is completely right about that."

He added: "It's not a choice whether you stand up for Scotland with the SNP or do something else with Labour, it is a Scottish Labour Party that is standing up for Scotland."

He said he was committed to swift action to hand new powers to Holyrood if Labour forms the next UK government.

Draft legislation has already been published, following on from commitments made by Westminster leaders in the days before the referendum.

Mr Miliband said: "Being here with 98 days to go until the general election I want the people of Scotland to know where Labour stands on the key issues that are going to be at stake in this general election - first of all our commitment to a powerful, permanent Scottish Parliament, and a Home Rule Bill which we will deliver swiftly.

"Today I am committing that we will lay out our Home Rule Bill before Parliament in the first 100 days of a Labour government."

Angus Robertson MP, the SNP's general election campaign director, said: "Our positive message is that people can only make Scotland's priorities Westminster's priorities by voting SNP.

"Returning a team of SNP MPs in a hung parliament means that Scotland's interests must be heard and acted upon. The Tories have been rejected in election after election in Scotland, and the SNP would never help them into power. By electing SNP MPs, the people of Scotland can vote to get rid of the Tories, and have a powerful voice to protect and promote Scottish interests.

"In recent days, we have seen Labour MPs voting with the Tories for £30 billion more austerity cuts, voting with the Tories to spend £100 billion on a new generation of Trident nuclear weapons, and abstaining on a key vote for a fracking moratorium. That is why we need the clout of a strong team of SNP MPs in a hung Westminster parliament to force change."

Conservative Party chairman Grant Shapps said: "The choice at this election is becoming clearer by the day: the chaos of a weak Ed Miliband with no economic plan being propped up by Sinn Fein and Alex Salmond - the man who tried to destroy the United Kingdom.

"Or the stability and competence of David Cameron delivering on our long-term economic plan that's securing a better future for Britain."