BBC Chief Political Correspondent John Sergeant: "Labour's real problem is getting their supporters to vote for them"

Setting out a series of pledges based on the joint manifesto of socialist parties in the European Parliament, Mr Blair insisted that only Labour could properly represent Britain's interests.

He reiterated his belief that the single currency should replace the pound if the euro proves itself a success and the government's economic criteria for membership are met.

Mr Blair is likely to come under fire from Eurosceptics for Labour's commitment to give up some of the UK's powers to veto measures put before the Council of Ministers.

Labour campaign co-ordinator Margaret Beckett: Tories are divided

But in a speech to Labour's Euro candidates, Mr Blair insisted that the Conservatives were unfit to be elected because of their hostility to Europe.

The Tories were incapable of providing credible leadership for the UK because of their internal divisions, he said.

"If they can't trust each other why should anyone trust them," he said.

Labour claims the ending of the beef ban as one of its Euro successes

Mr Blair said that the 10 June poll would offer voters the choice "between strong leadership and the splits and divisions that did so much to damage Britain's interests under the Tories".

The lifting of the ban on beef exports was just one of the successes achieved as a result of the improved relations the UK enjoyed with other European Union nations under Labour, he said.

'UK should adopt a successful euro'

Labour offered a bold agenda for reforming European institutions plus the drive and ideas to create greater economic success, Mr Blair said.

The BBC's Norman Smith: "The manifesto contains no surprises"

"I want to build a Europe of entrepreneurial spirit - completing the single market, unleashing competition, supporting small businesses, promoting trade."

Making the euro a success was part of achieving that ambition, even if the UK had not yet decided to adopt the new currency.

"We have made our position clear. We believe Britain should be part of a successful single currency," he said.

But he added that the economic criteria previously laid out by the government had to be met before the UK could contemplate signing up to the euro.

He said he would not set an "arbitrary timetable", but he hoped to be able to offer voters a referendum on the euro soon after the next general election.

'Not a manifesto for Britain'

Labour's manifesto was dismissed by the Tories even before it was published.

Robin Cook: Helped draft the Euopean socialists' manifesto

Tory vice chairman Andrew Lansley said he could do this as the document was based on the previously-agreed manifesto of the Party of European Socialists (PES).

The PES manifesto was drawn up by a working party of Labour's sister parties in Europe chaired by the Foreign Secretary Robin Cook.

Mr Lansley said: "Rather than presenting a manifesto for Britain's interests they have taken a manifesto for socialists across Europe and tried to sell it as a manifesto for Britain which it isn't."

He accused Labour of "destroying British jobs" by saddling businesses with extra regulations such as the Working Time Directive, which limits how many hours employees can work in a week.

Among the PES manifesto's pledges is a commitment to improve the efficiency of the Council of Ministers by "increased use of qualified majority voting".

Mr Blair refused to be drawn on which issues it would be "desirable" for the UK to give up its veto.