Mr Wineman insisted: "There was no exclusion of pro-settler voices. Mr Unsdorfer and Mr [Eric] Graus [president of Likud-Herut] have been invited to speak, and they will be welcome if they come."
Mr Medad had been ruled out, he said, because he lacked the immediate local experience of the delegitimisation of Israel in the UK.
A prominent spokesman for Jewish settlers in the West Bank has complained of being excluded from Sunday's Big Tent for Israel conference in Manchester.
Yisrael Medad is a former emissary to the UK for the right-wing Betar youth movement, who now lives in the settlement of Shiloh.
On his blog My Right Word, Mr Medad questioned the apparent lack of any settler representative at the advocacy event. He also referred readers to other bloggers who had been critical of the Jewish Leadership Council and the chairman of its executive, Mick Davis, over Israel.
Mr Medad's name was then suggested as a possible speaker, to organisers finalising the programme.
But Mr Medad said: "I was informed that my participation was rejected and it was intimated to me that I had insulted the UK Jewish leadership."
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