Eurosceptics tonight launched a series of scathing attacks on David Cameron's deal with the European Union, claiming it was mere 'crumbs'.

The Prime Minister finally secured agreement on reform of Britain's membership of the EU after a marathon Brussels summit, but was forced into a humiliating climbdown on his demands.

A compromise deal that will allow existing claimants to carry on receiving child benefits in full until 2020 falls well short of the outright ban on sending child benefit abroad initially demanded by the PM.

David Cameron was forced into a humiliating climbdown on his demands after he finally secured agreement on reform of Britain's membership

Daniel Hannah MEP poured scorn on the Brussels deal with a series of tweets complaining about the terms

It comes after eastern European states insisted all 34,000 existing claimants in the UK should continue to receive the full payment until their sons and daughters reach adulthood - something rejected as 'not acceptable' by the Prime Minister earlier in the negotiations.

And an 'emergency brake' on in-work welfare payments for migrant workers will be made available for seven years - shorter than the 13 years put forward by Mr Cameron in negotiations.

The deal on the table was instantly met with scorn by Eurosceptics left fuming by the terms of the agreement.

Leave.Eu co-chairman Richard Tice said: 'The Prime Minister promised half a loaf, begged for a crust and came home with crumbs.'

Daniel Hannan MEP tweeted: 'Britain banged the table and aggressively demanded the status quo.

'The EU, after some mandatory faux-agonising, agreed.'

He added: 'No new treaty, no powers back, and this is how Eurocrats teach us 'before' we vote.'

Nile Gardiner, a former adviser to Margaret Thatcher, said the deal consigns Britain to 'second class status'

The deal on the table was instantly met with scorn by Eurosceptics angry at the terms of the agreement

Nile Gardiner, a former adviser to Margaret Thatcher, tweeted: 'Cameron's 'deal' will consign Britain to second class status in a third class EU.

'The only option is to leave and restore British freedom.'

Last night Matthew Elliott, of Vote Leave, said Mr Cameron's 'hollow' deal was bad for Britain, adding: 'David Cameron always wanted to campaign to stay in the EU so he only ever asked for very minor changes. He will now declare victory but it is an entirely hollow one: the EU courts are still in control of our borders and our laws, we still send £350million a week to the EU instead of spending it here on our priorities and we have not taken back any control.

'Crucially, this deal is not legally binding and can be ripped up by EU politicians and unelected EU judges so it will have no more force than an unsigned contract.'

Eurosceptic Tory MP Tom Pursglove said: 'I was willing to give the renegotiation a chance, but the fact is that this does not deal with uncontrolled migration from Europe, and will not allow us to trade globally.'

European Council president Donald Tusk took to Twitter following the negotiations, posting: 'The #UKinEU settlement addresses all of PM @David_Cameron 's concerns without compromising our fundamental values.' However, such sentiment was not echoed by legions of Vote Leave campaigning Brits

And in a damning intervention, Labour MP Frank Field signalled his intention to support the leave campaign with a scathing attack on Mr Cameron's failure to secure any extra powers for the UK to control its own borders.

He said: 'The Government has failed to secure the key renegotiation requirement, namely that we should regain control of our borders.

'I shall therefore be campaigning to leave the EU.'

European Council president Donald Tusk took to Twitter following the negotiations, posting: 'The #UKinEU settlement addresses all of PM @David_Cameron 's concerns without compromising our fundamental values.'

However, such sentiment was not echoed by legions of Vote Leave campaigning Brits.

Lynda Hayes tweeted: 'The PM...poor tired chap. How do you say, 'We managed to pull the wool over his eyes' in German, French, Dutch etc?'

German Chancellor Angela Merkel during the final meeting at the Brussels summit, before the deal was announced

HE DIDN'T ASK FOR MUCH - AND HE GOT EVEN LESS Analysis by James Slack, Political Editor in Brussels TAX CREDITS What he wanted: A ban on EU migrants being paid in-work benefits for their first four years in the UK. Sticking point: In a compromise, Britain is being granted an emergency brake which allows for benefits to be restricted for up to four years if Britain's public services or welfare system is under pressure. However, the EU insisted that the 'limitation should be graduated, from an initial complete exclusion to gradually increasing access to such benefits'. This was still the subject of a huge row yesterday. Mr Cameron wanted the brake to be in place for up to 13 years. Eastern Europe objected strongly. Eastern European countries also want a guarantee that the brake could be used by the UK only – not nations such as Germany and Sweden, which have also experienced a huge influx of workers. CHILD BENEFIT What he wanted: The 2015 Tory manifesto promised that: 'If an EU migrant's child is living abroad, then they should receive no child benefit, no matter how long they have worked in the UK and no matter how much tax they have paid.' Sticking point: A watered down agreement that child benefit payments will be linked to the cost of living in the child's homeland has been agreed. But Eastern European countries insisted the rules should not apply to people who were already in the UK. The new regime is likely to be phased in over a number of years. Again, Eastern Europe does not want any other EU country to be able to apply the new rules. PROTECTION FROM THE EUROZONE What he wanted: A mechanism to ensure that Britain cannot be discriminated against because it is not part of the euro, cannot pick up the bill for eurozone bailouts and cannot have imposed on it changes the eurozone want to make without our consent. Sticking point: France spent days fiercely resisting the idea that Britain can interfere in the workings of the euro. Other EU countries were opposed to the idea that any agreement Mr Cameron secures should be enshrined in future treaties. EVER CLOSER UNION What he wanted: Exempt Britain from the commitment in the EU's founding treaty to move towards 'ever closer union'. Sticking point: The EU said it was content to acknowledge 'that the United Kingdom, in the light of the specific situation it has under the treaties, is not committed to further political integration into the European Union'. However, EU leaders were opposed to the idea of enshrining this in future EU treaties – which is key if Mr Cameron is not to face accusations that his deal can be unpicked. AND THINGS HE ONCE PROMISED BUT NEVER ASKED FOR: Charter of Fundamental Rights. In 2009, Mr Cameron promised a complete opt-out of the charter, which further extends human rights laws. Social and employment laws. In 2010, Mr Cameron pledged to claw back powers from Brussels, but this was quietly dropped. Working time directive. In 2012, he promised to change the law that includes the contentious 48-hour maximum working week. Common Agricultural Policy. Repeated calls for reform of farming subsidies, but no sign of any change yet. Waste. In 2009, he promised to end the European Parliament's 'absurd' practice of meeting in Strasbourg as well as Brussels. Advertisement

User @Cybeeria said: 'Cameron has failed dismally to secure the fundamental reforms he promised us. The ONLY way to get them now is ti #VoteLeave.'

In a further blow to the Prime Minister, his friend and Justice Secretary Michael Gove has confirmed he will campaign for Britain to leave the EU.

Mr Cameron said: 'He has wanted to get Britain to pull out of the European Union for about 30 years.

Michael Gove has confirmed he will support the Out campaign, in a further blow to the PM

'Of course, I'm disappointed that we're not going to be on the same side as we have this vital argument about our country's future - I'm disappointed but I'm not surprised.'

Mr Cameron has previously promised to suspend the principle of collective responsibility after the meeting, giving a green light to Eurosceptic ministers like Iain Duncan Smith and Chris Grayling to go out and campaign for Britain to leave Europe without having to quit their jobs.

Waverers like London mayor Boris Johnson will now face tremendous pressure to spell out where they stand.

The deal came after behind-the-scenes talks which stretched through Thursday night and most of Friday, as Mr Cameron and Tusk struggled to keep Britain's renegotiation on track.

The 28 leaders had initially been due to gather early in the morning for an 'English breakfast' meeting to approve a package of reforms to the UK's membership, but breakfast became brunch, lunch, high tea and then dinner as opponents of the deal dug in their heels.

The delays forced Mr Cameron to scrap plans to summon ministers for a Cabinet meeting on Friday evening.

Mr Cameron had faced concerns from eastern European countries like Poland, Hungary, the Czech Republic and Slovakia over his call for an 'emergency brake' on in-work benefits for migrant EU workers to extend for as long as 13 years.

And the same nations put up stiff resistance to the UK's demand to impose cuts in child benefits for offspring living abroad on 34,000 existing claimants as well as future migrants.

Meanwhile, France and Austria voiced anxiety that the protections for non-euro states sought by Mr Cameron might effectively grant special status to the City of London and allow Britain to hobble future deepening of the eurozone.