The 42-year-old, who has not been named, was charged with three offences, after he was one of 12 people arrested in connection with the investigation on Sunday 12 and Monday 13 July.
While four of those were released on police bail, eight others were detained under section 41 of the Terrorism Act, enabling them to be held for up to seven days from their arrest.
Seven of those men were released from custody without charge today (Saturday 18 July).
Counter Terrorism Policing (CTP) had earlier opened an investigation into a suspected threat against the UK Ijtima event held at Shrubland Hall, Suffolk from 9-12 July.
Following the recovery of certain items during searches carried out as part of the investigation, the 42-year-old man has been charged with two offences linked to possession of offensive weapons - namely extendable batons - as well as possession of a stun gun.
He has been remanded in custody to appear at Reading Magistrates' Court on Monday 20 July.
Police said the items the items recovered and the offences he has been charged with are not believed to be connected to the alleged threat being investigated.
A thirteenth man was also arrested on Thursday 16 July on suspicion of an offence under section 5 of the Terrorism Act, 2006.
Commander Helen Flanagan, Head of Counter Terrorism Policing London said: "This has been a fast-moving investigation after we became aware of information to indicate there was a potential threat towards the Islamic event over the course of last weekend.
"Since then, we have made extensive enquiries, but at this time, we have found no evidence to support anyone being charged with any offences linked to the alleged threat.
"While I know this may still be very concerning to the public and particularly to those in the Muslim community, I want to reassure them that our enquiries are ongoing. Should we identify any potential offences or threats to the public then we will not hesitate to take further action.
"I want to reiterate my thanks to the event organisers and to the local community in the area for their continued support and understanding as our investigation continues."
Detective Chief Superintendent Paul Wells, from Suffolk Constabulary said: "We've had a visible and active police presence in the community around Shrubland Hall during the week.
"I repeat our earlier message of gratitude for the patience, support and understanding shown by local residents and others, during last weekend and since. We will continue to support our Counter Terrorism Policing colleagues with this live investigation as required."
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The Scottish athlete completed four laps in the Diamond League meeting at the London Stadium, in the capital's Olympic Park.
A capacity crowd of about 60,000 saw him shave half a second off the previous best, set in 1999 by Moroccan Hicham El Guerrouj.
Kerr, the Olympic silver medallist in the 1500m, crossed the line in front of a rapturous home crowd in three minutes 42.66 seconds.
He had been targeting the record as part of what he called "Project 222" - the number of seconds he needed to hit to beat the record. His previous best was 3:45.34.
Kerr, 28, ran in a specially designed black suit and running spikes by the running company Brooks.
Pacemakers led the way before dropping out with a lap and a half to go, leaving Kerr with a sprint to the line, well ahead of the rest of the field.
He finished more than three seconds clear of second-placed US athlete Yared Nuguse whose time was 3:45.69.
"It was just incredible, that last lap," Kerr told the BBC. "It was just me, my shoes and the track. I was absolutely deaf in the last 110 metres.
"I didn't take my foot off the gas," he continued, "but... I started to glide and I was like 'oh wow this feels incredible'. It's incredible because I'm slowing down.
"So, I was like 'I better get to the line'. So, crossing the finish line, seeing 42-something - anything - was my goal, so it was great."
Kerr added: "Today, that was a performance I was able to bring out - I hoped it was going to be a little bit faster, but that's alright."
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The mile is an event which is not typically run at World Championships or Olympic Games, but in March the former world 1500m champion announced his intention to try to break the men's mile record.
The feat on Saturday earned him a cheque for $50,000 (£37,000).
His win means the mile record is back in British hands after Roger Bannister famously became the first person to run under four minutes in 1954.
Fellow Britons Steve Cram, Steve Ovett and Sebastian Coe previously held the record, before Algerian Noureddine Morceli set a new best in 1993, followed by El Guerrouj in July 1999.
Also on Saturday, Olympic champion Keely Hodgkinson was looking to make history in the women's 800m.
The British runner won the race but had to settle for a time of 1:56.21.
That didn't threaten the 1:53.28 record of Jarmila Kratochvilova - then running for Czechoslovakia - which she set in July 1983. It is the oldest world record in athletics.
The 43-year record continues with Hodgkinson's hopes hampered after an accident while cooling down during a training session in Wigan when she tripped over and landed on a metal grate, injuring her knees.
Sky News can reveal that the London & Valley Water (L&VW) consortium has engaged Pallas Partners - which describes itself as an "elite litigation and disputes firm" - to draw up plans for a legal fight with the government if its offer for the company is rejected.
Pallas Partners has been drafted in to work alongside Akin Gump, the law firm which is advising the consortium on the terms of their restructuring proposals, according to people close to the situation.
L&VW has been formed by a syndicate of fund managers including Apollo Global Management, Elliott Management, Farallon Capital Management and Silver Point Capital, which collectively hold £17bn of Thames Water's £21bn debt pile.
They have been involved in negotiations about a £10bn deal to take control of Thames Water and avert the prospect of it being placed into a special administration regime (SAR), a form of temporary public ownership.
However, Sir Keir Starmer's departure from Downing Street and his replacement next week by Mr Burnham has exacerbated concern within the consortium that the new administration will reject the deal.
Mr Burnham has spoken about his desire to see "public control" of water companies, although he is yet to spell out whether this means nationalising the sector.
In relation to the industry's largest operator specifically, he said last month: "I would say for Thames Water, that [greater public ownership] is what should be done."
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That rhetoric has prompted the L&VW consortium to accelerate their own contingency plans for legal action against the UK government, according to City sources.
One said that Pallas Partners had been brought in to assist with a litigation "strategy", which could include challenging a SAR or outright nationalisation on a variety of different legal grounds.
"They are prepared to litigate for years if necessary," said one banker who has worked with some of the funds involved.
A person close to the consortium said the prospect of litigation was "a last resort" and that it was keen to work with the government on a solvent rescue deal which addressed Whitehall's concerns about the restructuring proposals.
"There is no legal action being taken right now," the person said. "This is purely precautionary."
Under the latest terms submitted to Ofwat, the industry regulator, the funds would inject £3.35bn of new equity alongside a total of £6.25bn of new debt.
It would also entail writing off £9.6bn of Thames Water's existing debt.
The company's annual results, published this week, stoked fresh controversy by revealing that chief executive Chris Weston had seen his total pay increase to £1.16m despite the parlous nature of its finances.
Emma Reynolds, the environment secretary, sparked further doubt about whether the government would accept the proposed rescue deal last month when she wrote to Ofwat to express concern about its terms.
"I am not yet convinced that the Proposal demonstrates sufficient protection for consumers' interests," she wrote.
"I understand that there will be some bill impacts in this price review period and further rises in the next period as a direct result of these regulatory adjustments.
"I am concerned that consumers will ultimately bear an undue cost for these adjustments."
It remains unclear whether Ms Reynolds will retain her cabinet post under Mr Burnham, although members of the L&VW consortium expect the new prime minister to show even greater scepticism towards a deal.
This week, the Ofwat chair, Iain Coucher, wrote to Ms Reynolds to inform her that a fresh proposal was in development: "As you are aware, through Defra-led engagement with the company, consortium and Ofwat, L&VW is working on a revised proposal.
"We will consider any such revised proposal, if requested to do so by the company's board, in accordance with our statutory duties, including to ensure that the interests of customers are adequately protected."
Sources close to the consortium said it was preparing a robust set of further proposals, with reports suggesting that an offering of Thames Water shares to customers was among the ideas being considered.
Under their plans, the creditors would not pay any dividends to shareholders until the 2030s, with a plan to return the company to the public markets in about five years' time.
Ofwat is required to hold a three-month public consultation on a private sector deal, meaning that time is running out for such a process to be launched.
Thames Water repeated a warning this week that it would run out of money by the end of the year, although creditors have stated their intention to continue financing the company into 2027.
A spokesperson for L&VW declined to comment this weekend.
It comes after South East Water said an "instrument failure" caused a temporary shutdown at a water treatment works.
The company has confirmed a free bottled water station is open at a Tesco superstore in Pembury Road, Tunbridge Wells.
And another bottled water station is set to open shortly.
Tunbridge Wells MP, Mike Martin, said in a post on X that "overall we have approaching 8,000 households out of water in Sandhurst, Pembury and South Tunbridge Wells".
He said bottled water stations were open until 10pm on Saturday and would be opening again at 7am on Sunday.
He added that households in South Tunbridge Wells and Pembury were unlikely to have water back until Sunday.
Mr Martin said "the cause of the outage" was that a "piece of equipment at Pembury Water Treatment works failed".
South East Water said in a statement: "We are very sorry to all customers affected by this issue and thank our customers for their patience during this period."
The company earlier said the site was running again but "low storage tank levels and high demand means we cannot pump water to customers, especially on higher ground, causing low pressure, no water, or intermittent supply".
"To stabilise tank levels, your water supply will not return until at least tomorrow morning."
South East Water customers have endured previous disruption, with homes and businesses in Kent suffering supply failures in late May.
The company has around 2.3 million customers in the South East of England.
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During last winter, there were supply interruptions in Tunbridge Wells and across Kent and Sussex.
The firm said more than 77,000 customers experienced "periods without water supply, low pressure or intermittent supplies" as a result of leaks and bursts across the network and storms causing power cuts.
South East Water is facing a £30.5m redress package for multiple customer service failures, the industry watchdog announced earlier this week.
Ofwat said last Tuesday that the company, which has suffered a series of supply interruptions, would have to foot the bill for its shortcomings along with shareholders, rather than place the burden on long-suffering household bills.
Kyle Bylin discovered his birth family by taking a DNA test he chose randomly during a Christmas gift exchange.
The results led him to his biological aunt on a genealogy platform. Her nephew, Jeremy Morrison, then had his DNA tested, and the birth switch was revealed almost four decades on.
"That's when my mind was just completely blown," Mr Bylin said. "We could have never imagined that it was an actual birth switch that occurred."
Mr Bylin and Mr Morrison were the only babies born on 26 January 1988 at Unity Medical Center in Grafton, North Dakota, according to a lawsuit filed in state court last week.
However, they left hospital with the wrong parents.
The hospital does not dispute that the babies were switched, but it says that it has not uncovered any evidence that its staff were responsible for the life-changing error.
"We recognize the profound impact this discovery has had on them and their families," Unity Medical said in a statement.
"Unfortunately, because of the passage of nearly four decades, the medical and staffing records that might have provided additional clarity no longer exist, and no members of the delivery team from that time are still employed by the hospital."
Two years have passed since the DNA test revealed the swap.
"Kyle is still my son - that is never going to change," said Evelyn Newton. "But I feel robbed of the life I should have had with my biological son. You can't go back and replace 35 years. First steps, driving a car, getting married - how do you make up for that?"
Mr Morrison's new knowledge of his birth has not changed the way he feels about the family which brought him up.
"I was loved," he said. "I played sports, I did well in school. A DNA test is not going to take away 38 years of memories."
But Mr Morrison, who lives in Colorado and works as a welding inspector for a wind energy firm, believes that he would be working with his biological father and brother on their grain farm had it not been for the swap.
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Ms Newton never had any reason to believe that Mr Bylin was not her biological son
Mr Bylin, however, pursued an academic career far from North Dakota, and felt "different" from the family who raised him.
"There have certainly been different times throughout my life when I felt like a black sheep in my family, or that like maybe I was looking for someplace that I belonged," he said.
"And only to find out years later that there really was a difference... that there is a reason why I didn't 100% fit in all the time."
The men have now met their biological parents, but not each other. However, they have spoken on the phone.