Birmingham MPs have demanded an early recall of Parliament so they can express their opposition to Tony Blair's handling of the Middle East crisis.
They demanded an opportunity to hold the Prime Minister to account in the Commons, as he admitted he faced a major cabinet revolt over his failure to demand an immediate ceasefire between Israel and Hezbollah.
But Mr Blair was unapologetic yesterday, insisting a ceasefire should be based on a United Nations resolution, which he hoped would be agreed "within the next few days".
In a Downing Street press conference he said: "I don't doubt that there are people who disagree within the system and I have no doubt there are Cabinet ministers who have doubts about this or that aspect - possibly about the whole aspect of the policy."
The letter, addressed to Margaret Beckett, the Foreign Secretary, was signed by Lynne Jones (Lab Selly Oak), Richard Burden (Lab Northfield) and Khalid Mahmood (Lab Perry Barr).
Parliament began its long summer recess on July 25 - and is not due to sit again until October 9.
But the letter, signed by a total of 15 Labour MPs from across the country, calls for a special emergency session.
It follows reports that members of the Cabinet are also concerned about Tony Blair's support for US President George Bush's approach.
Leader of the Commons Jack Straw, International Development Secretary Hilary Benn and Environment Secretary David Miliband are among senior ministers reported to have voiced concerns about the policy.
Even Margaret Beckett, the Foreign Secretary, is said to have misgivings about the policy.
Dr Jones said: "Tony Blair must be held accountable by Parliament for what he is doing." Mr Mahmood said: "It is absolutely disgraceful that Britain is standing by and not saying anything."
Mr Burden has written a lengthy letter to the Prime Minister calling for urgent action from Britain and the US.
The chairman of the Parliamentary Labour Party, Ann Clwyd, warned there was anger among backbenchers.
Mr Blair's day was made all the worse by an outspoken attack by a former senior ambassador.
Sir Rodric Braithwaite said that Mr Blair's "total identification" with US policy had wrecked Britain's influence abroad and increased the likelihood of terrorism at home.