Britain's Channel 4 News has backtracked on a report naming a known “hate-preacher” as the man behind an attack on parliament in London.

Channel 4 claimed Abu Izzadeen, also known as Trevor Brooks, from Hackney in London, was the suspect. The news was quickly also reported by mainstream newspapers including the Independent and the Daily Mirror.

But claims soon followed that the man is in fact currently serving time in jail.

Izzadeen's solicitor was quoted by US channel ABC as saying his client was still in jail and could not have been the attacker.

Trevor Brooks aka Abu Izzadeen's solicitor confirms to me that he is still in jail and cld not have been the attacker today at #Westminster — Rym Momtaz ريم ممتاز (@RymMomtaz) March 22, 2017

Several media outlets are claiming London killer is Abu Izzadeen, but his solicitor has confirmed he is still in jail. — Nick Lowles (@lowles_nick) March 22, 2017

Reporters from Channel 4 have also since backtracked, adding that Izzadeen's brother confirmed the Islamist is still in prison.

From certainty to uncertainty, good illustration of why we mustn't rush to judgement on id of suspect from @simonisrael on @Channel4News. pic.twitter.com/8YJaH7QbTu — Gordon MacMillan (@gordonmacmillan) March 22, 2017

"On tonight's Channel 4 News, senior home affairs correspondent Simon Israel quoted a source as saying that the name of the Westminster attacker was believed to be Aby Izzaddeen, formerly known as Trevor Brooks," an apologetic statement by the channel read.

"During the course of the programme, conflicting information came to light. Channel 4 News is currently looking into this."

Statement from Channel 4 News: pic.twitter.com/MMo1sFu3Mh — Channel 4 News (@Channel4News) March 22, 2017

The source I trusted, but ultimately I made a mistake. This time I got it wrong. Abu Izzadeen is in prison. — simon israel (@simonisrael) March 22, 2017

Izzadeen’s name, however, was already trending on social media with thousands of tweets. Many believed him to be the shot attacker, due to a superficial similarity in appearance to the actual alleged attacker.

Many used the opportunity to blame the Muslim community for the attack, with the leader of the far right group Pegida UK, Tommy Robinson, tweeting: “So I was right again, I've warned about this exact man for over a decade.”

Aaaaaand the News has been pulled from Ch4+1 pic.twitter.com/SoHO8rjdSr — Paddy (@Pads45N) March 22, 2017

BBC journalists seemed to mock the readiness of their competitor to jump the gun on the report.

Well, how does Channel 4 News square this: Trevor Brooks aka Abu Izzadeen's solicitor says he's still in jail!! — Andrew Neil (@afneil) March 22, 2017

Channel 4 News says it has confirmed the attacker was Trevor Brooks aka Abu Izzadeen, well known to the security services and the media. — Andrew Neil (@afneil) March 22, 2017

“Well, how does Channel 4 News square this: Trevor Brooks aka Abu Izzadeen's solicitor says he's still in jail,” tweeted veteran BBC Daily Politics show host Andrew Neil. Although Andrew Neil was himself one of the first mainstream commentators to tweet the claims from Channel 4.

Note: The first version of this breaking story quoted the original Channel 4 report naming Abu Izzadeen as the attacker.