Stephen Sizer, who once supported claims that Israel was behind the 9/11 terror attacks, is to be one of the speakers at this weekend’s Al Quds Day march in London.

The Reverend, who was later banned by Church of England authorities from sharing inflammatory material on Israel on social media, will join notorious anti-Zionist Mick Napier, of the Scottish Palestine Solidarity Campaign, as a speaker at Sunday’s annual demonstration.

Mr Sizer’s presence at the Al Quds Day event will cause widespread anger among Jewish communal organisations and follows last week’s announcement by the Metropolitan Police that they are powerless to stop the flying of the flag of Iranian-led terror organisation Hezbollah on the march.

In December 2015, the Church of England condemned Dr Sizer for sharing material which was “clearly antisemitic”.

Before he became Labour leader, Jeremy Corbyn had defended him saying Mr Sizer was being victimised because he “dared to speak out against Zionism.”

Last year, Mr Napier was found guilty of aggressive behaviour at a protest outside an Israeli-owned cosmetics store in Glasgow during the 2014 Gaza war.

Last week, the JC revealed the Met Police, in answer to a letter from MP Louise Ellman, the vice-chair of the Labour Friends of Israel, said that they had to allow the controversial flag to be raised once again at Sunday’s parade because parliament had “consciously chosen” to proscribe only the military wing of Hezbollah – but the group’s flag is “shared across all elements of that organisation.”

Metropolitan Police Commander Jane Conners said in her letter of reply that both she and Commissioner Cressida Dick “share concerns” that the raising of the Hezbollah flag on London’s streets “may be construed as belonging to a terrorist organisation.”

At last year’s Al Quds Day march, the JC revealed, how Nazim Hussein Ali, an Islamic Human Rights Commission speaker, linked the Grenfell Tower tragedy to “Zionists” and calling for Israel’s annihilation at this year’s Al Quds Day march.

Following complaints about Mr Ali’s conduct – and the open display of Hezbollah flags – the Metropolitan Police confirmed it was investigating allegations of antisemitic comments made during the protest by Mr Ali.

But in December the Crown Prosecution Service had he would not face prosecution.