The Mail knows the identity of the terrorist, but has chosen not to name him at the request of the police

One of the London Bridge attackers appeared alongside two notorious Islamist preachers in a TV documentary.

He was filmed at extremist events alongside Mohammed Shamsuddin, who has publicly hailed his support for Islamic State.

Shamsuddin, who has claimed state benefits since he was 18, has also called for Sharia law in the UK and made chilling warnings about a ‘backlash’ by British Muslims.

He was also pictured with Abu Haleema, who was accused of radicalising a British schoolboy who was convicted over a plot to behead police officers during an Anzac Day parade in Australia.

Shamsuddin is a disciple of Omar Bakri Mohammed – the Tottenham Ayatollah – and his successor Anjem Choudary.

He has been at the forefront of Islamist protests over the past decade, and openly admitted preaching a message of ‘world domination’.

In a Channel 4 documentary last year, Shamsuddin was shown praying with a group of followers including one of the London Bridge attackers in London’s Regent’s Park under the black flag of Islam.

Shamsuddin told his followers: ‘The Sharia is coming to the UK – this black flag you see here one day is gonna be on 10 Downing Street.’

Minutes later, the pair were shown in a confrontation with police who had received a tip-off about the flag

The jihadi was filmed at extremist events alongside Mohammed Shamsuddin, pictured, who has publicly hailed his support for Islamic State. There is no suggestion he is connected to Saturday’s attack

After an ugly standoff, they were detained for an hour – but the flag was not discovered.

Shamsuddin later told the filmmakers: ‘Our message is deadly, we are calling for world domination, and for Sharia for the UK.

After criticising British foreign policies and treatment of Muslims, he added: What’s gonna happen, you’re gonna face a backlash in this country... if you’re gonna suppress and suppress I mean it’s like a tinder box, it’s gonna explode.’

There is no suggestion Shamsuddin or Haleema are connected to Saturday’s attack.