Gordon Brown reached agreement on the EU's new reform treaty in the early hours of this morning.
The news triggered a predictably ferocious response from certain sections of the press, which are almost foaming at the mouth at the prime minister's refusal to hold a referendum on the issue.
The story makes the front page of the Sun, with the typically unsubtle headline "Bottler Brown in Euro sell-out". The paper's leader offers a stark warning to the PM, saying: "Gordon Brown last night took the fatal step of breaking his word to Sun readers", and says he "will live to regret breaking his promise".
The Express rivals the Sun in its apoplexy, heading its report "The traitor". "A prime minister who came into office promising a new era of straight politics is engaged in a breach of trust as monstrous as anything his fork-tongued predecessor managed," the paper says furiously.
Not to be outdone, the Mail asks: "What kind of strength is built on such arrogance? If EU leaders don't trust us, why on earth should we trust or respect them?"
The Telegraph is slightly more restrained, but reports the formation of the European Referendum Campaign, announced in a letter to the paper from what it calls "an eminent team of academics, diplomats and politicians ... in all 27 member states". It says the new group is "proof that referendum fever is not confined to Britain".
The Times splashes with the story that Mr Brown "has set aside up to three months to ratify the new EU reform treaty, raising the spectre of the tumultuous parliamentary battles over Maastricht 15 years ago".
In an analysis piece for the paper, Peter Riddell says there needs to be more clarity as to just when a referendum is necessary, noting that "there is no agreement about when they should be held".
The Guardian reports that Mr Brown - perhaps somewhat optimistically, given the coverage in other papers - "dismissed claims that his decision may cause him political damage at home".
However, the Mirror offers some comfort to the prime minister. "Every time the prime minister explains Britain's 'red lines', and what the plans to modernise decision making in the European Union really mean, the case for a referendum fades," it says.
This is an edited extract from The Wrap, our digest of the daily papers.
