Hundreds of people gathered at a rally in central London to protest against the Gaza conflict.
Speakers took it in turn to condemn the Israeli and British Governments.
Former Labour Cabinet Minister Tony Benn said the Israeli Ambassador to the UK should be expelled.
He said: "We should be making a demand on the British Government because speaking for myself, and I am sure for you, I think the response of British Government has been an absolute disgrace.
"That is a demand that can perhaps come out of this meeting."
Among the 11 speakers who addressed the rally at the Friends Meeting House were Respect MP George Galloway and the President of the University and College Union (UCU) Sasha Callaghan.
Ms Callaghan called on Prime Minister Gordon Brown to speak out against the Israeli attacks.
She said: "We ask him to stand up and be brave and walk out of the shadow of US foreign policy and condemn what is happening in Gaza."
Mr Galloway criticised media coverage of the conflict and the language used by some journalists.
He said: "Israel is not targeting Hamas militants in Gaza. How can a warship firing its lead and fire onto a beach and beyond be said to be targeting anyone."
