Did a serving policeman make up ‘Plebgate’ claims?

The officer is said to have written to his local MP, posing as a member of the public, giving details of the altercation that took place when the senior Tory attempted to cycle out of the main gates in Downing Street.

Number 10 said the claims - which emerged after a member of the diplomatic protection squad was arrested - were “exceptionally serious”.

The Metropolitan Police Service said today it was conducting a “thorough and well-resourced investigation” that could look at conspiracy.

In a statement it said: “The allegation that a serving police officer fabricated evidence is extremely serious.

“It goes to the very heart of the public’s trust in the police service.

“The Metropolitan Police Service is conducting a thorough and well-resourced investigation to get to the truth of the matter as quickly as possible.

“Since receiving fresh information last Thursday, the MPS has acted swiftly.

“On Saturday, an investigation into the alleged unauthorised disclosure of information was reopened. On Saturday evening, an officer was arrested on suspicion of misconduct in public office.

“On Sunday, the investigation was referred to the IPCC (Independent Police Complaints Commission) for supervision.

“The investigation is looking at the alleged unauthorised disclosure of information and the circumstances surrounding a police officer’s claim to have witnessed an incident in Downing Street.

“If any evidence emerges of conspiracy this will form part of the investigation.

“This is a fast-moving and comprehensive investigation and the highly unusual events of the last three days have shown this inquiry will need to go where the evidence takes us as it progresses.”

It comes after CCTV footage of the incident was broadcast for the first time and appeared to contradict parts of a leaked police log about the spat.

Although there is no sound, the MP - who clung on to his job for a month before finally resigning - can be seen with his bicycle talking to three officers by the main gate for around 20 seconds. He then wheels it over to the side gate and exits.

The footage, broadcast by Channel 4 News, appears to show there were few members of the public passing by at the time - apparently contradicting police records.

Mr Mitchell demanded a full probe into the police account of events and insisted the email - sent to MP John Randall - was key to the loss of his job.

“I always knew that the emails were false, although extremely convincing,” he told Channel 4 News last night. “It has shaken my lifelong support and confidence in the police.

“I believe now there should be a full inquiry so we can get to the bottom of this.”

The police officer reportedly did not disclose his job in the email to Mr Randall, who was Mr Mitchell’s deputy in the government whips’ office and reportedly suggested he would quit unless his boss left his post.

He described how he had been walking past Downing Street with his nephew when the spat took place.

The email said Mr Mitchell had sworn repeatedly and called the officers on guard “plebs”. It also suggested that passers-by outside the gates had been shocked, and some may have filmed the confrontation.

The account closely matched that in the official police log, which was later leaked to the Daily Telegraph.

Mr Mitchell said his first reaction to the story emerging in September was “there’s not really much of an altercation”.

“There were three phrases above all which were hung around my neck for the following 28 days every day in the press which were used to destroy my political career and were used to toxify the Conservative Party,” he said.

“They are completely untrue, I never said phrases like that at all, I would never call someone a f****** pleb, anyone who knows me well would know that it is absolutely not in me to use phrases like that.”

Asked why he did not give a more detailed account before, Mr Mitchell said: “Well when the story broke, the decision was made that I would apologise for what I did say, and my apology was accepted, there was no police complaints and that we would let it lie.

“Now with the benefit of hindsight, that was clearly the wrong decision.”

Former Tory leader Lord Howard told BBC Radio 4’s Today: “I am appalled at the suggestion that a police officer could do what it is alleged that the police officer in question did.

“And I certainly do hope that Andrew Mitchell is restored to government at the earliest possible opportunity.”

Tory former shadow home secretary David Davis said his party colleague had been the victim of “a really serious injustice” and should be restored to the ministerial ranks.

“This is a shocking revelation that a police officer seems to have masqueraded as a civilian - more than seems to, I’ve seen the emails and clearly did so - and acted in a way which effectively completely undermined Mr Mitchell in the eyes of the Prime Minister and the rest of Downing Street right at the point they were making the decision - what do we do, do we support him or not?” he told the BBC Radio 4 Today programme.

“That explains quite a lot of the, frankly, what appeared with hindsight to be daft decisions in terms of the way they handled the whole issue.”

He went on: “As a result we have had a serious injustice, a really serious injustice. He should be returned to high office.

“He was a fantastic international development secretary. He probably will not become chief whip again but I think the injustice should be put right.”

He said the content of the email was “virtually identical” to the police log and insisted Scotland Yard still needed to investigate whether the official account was accurate given that it “doesn’t appear to fit with the CCTV”.

“This is very important because it goes right to the heart of whether that original log was absolutely true. Was the lily gilded? Was it changed in any way?” he said.

“That’s vital and I’m afraid Mr Hogan-Howe has to address that issue as part of his investigation.”

Mr Davis criticised the Cabinet Secretary and the Met for failing properly to examine the evidence when the allegations first emerged.

“Whether it’s the Met investigation or Sir Jeremy Heywood, none of this is exactly Sherlock Holmes,” he said.

“All the investigations did not go to the heart. Look at the CCTV, see whether it is consistent with the allegations made, consistent with what’s been said. It plainly wasn’t.

He said he believed Conservative deputy chief whip John Randall had “no choice” but to pass on the email.

“He probably thought his first duty was to bring it to the attention of Number 10 and let them check,” he told the programme.

And he said the Police Federation had “some questions to answer” about its tactics.

“This is an organisation who represent policemen who are supposed to uphold justice and justice has not been at the forefront of their tactics through all of this.”