What can you do with varnish, plywood, a wheelbarrow inner tube and a solar panel not much bigger than a mobile phone?
The answer, if you are a computer genius with a conscience, is to fight back against sewage pollution.
John Clifford has created an early warning system.
He said: “When pollution spikes, if it goes up more than 10%, we know that something’s gone on in the river.
“When several sensors all at once that are telling us the same thing, then we know that there’s a big problem.
“The app on my phone will update regularly and quite often.
“It’s the first thing I check in the morning.”
Mr Clifford lives in west London and the kit will float on the River Brent which, like so many of our rivers, is regularly polluted.
Alongside colleagues he’s making at least 30 of these sensors which measure what’s called TDS or total dissolvable solids – shorthand for faeces, food waste and soap residue.
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They send data on the level of these unwanted ingredients in real time to an app, but despite that sophistication they are cheap.
Image: The floating gadgets, which are able to monitor pollution levels around the clock, are cheap
At around £100 per sensor they are a fraction of the cost of professional kit which typically can cost £6,000.
The team behind the tech, CURB (Clean Up River Brent), got together after local resident Ben Morris was outraged by an incident in 2021, which turned the river grey with sewage sludge bordered by soapy white residue and was very smelly.
They began with campaigning and clean ups, but he feels their gadgets will make the biggest difference.
Mr Morris said: “Once you know what’s in the river, you can then start to have a conversation about what should be done about it.
“At the moment, there are too many unknowns about the sewerage system, too many unknowns about water quality.
“You get something like this in nationwide, we can really raise public awareness and political awareness, and then we have to have that tough conversation about what we’re going to do about it.”
Image: Across England, there were over 300,000 sewage spills in 2022
And he is perfectly happy to get to grips with the dirty end of the stick too.
I join him mid-stream, up to our waists in the River Brent just beside a massive drainage pipe.
The water around us is flecked with fragmented toilet paper and twigs trapped beneath the surface are draped with a flowing beard of dirty tissue.
‘It does whiff’
Thankfully we are in waders, but it does whiff.
We are installing two types of sensor.
One is static, fixed to a stake hammered into the river bed, the other their new floating design.
It is tethered to a paving slab on a length of rope.
It has a solar panel on the top, a box of electronics beneath, sitting on the inflated inner tube while dangling below in the water are the actual sensors.
When the river rises after heavy rain, it remains on the surface and able to communicate 24/7.
This is important as pollution is often worse when the sewerage system is overwhelmed in a downpour.
Across England, there were over 300,000 sewage spills in 2022.
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The Environment Agency faces accusations of failing to protect our waterways but its budget has been cut by half in the past decade and Lewis Elmes, the area catchment coordinator, says they will gladly accept help from talented amateurs.
He said: “It complements what we’re doing, as it really increases the scope of what we’re able to achieve by producing a bit of equipment that’s so much cheaper than our much more expensive bits of kit.
“It really allows us to work to expand the boundaries of what we can look at in our rivers and the amount of outfalls that we can keep an eye on.”
River Brent’s own ‘Q branch’
The Environment Agency is trialling the brilliant shed tech from the River Brent’s own “Q branch” over the next year.
If it works the idea could go nationwide giving a much clearer, immediate picture of water pollution.
When it comes to fighting back, knowledge is power.
The father of the Manchester synagogue attacker has called for unity, as the community marked one week on from the assault which claimed the lives of two men.
People gathered outside the Heaton Park Hebrew Congregation in Crumpsall at 9.30am, the time of the attack last Thursday, to pray and mourn the victims.
Image: Pic: PA
Image: Pic: PA
Jihad al Shamie was shot dead by police after launching his car and knife attack as worshippers gathered on Yom Kippur, the holiest day in the Jewish calendar.
In a statement posted on Facebook, al Shamie’s father Faraj wrote: “The recent tragic act of terror has brought deep pain – to our family and to the families of the victims. Our hearts and prayers are with them.
“No one should ever experience such suffering again. We must all stand together – united, vigilant and compassionate – to prevent such acts and protect the peace of our communities.”
Adrian Daulby, 53, is believed to have been shot dead by police while attempting to prevent al Shamie from entering the synagogue.
Mervyn Cravitz, 66, also died while trying to keep the attacker from entering the building. Three other people remain in hospital.
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Manchester synagogue terrorist: what we know now
Rabbi Daniel Walker told the congregation that “evil will not prevail” and called for “deep resolve” from the community.
There was applause from the crowd for Greater Manchester Police, with a large presence of officers at the event, for their response on the day of the attack.
Raphi Bloom, a board member of the Jewish Representative Council, said there was a feeling of anger in the community as “we were screaming this would happen and no one listened”.
He told Sky News: “Our feelings are still of mourning, of fear and of isolation. We feel very alone. We’re very, very angry that this was allowed to happen and fearful that it will happen again.
The Princess of Wales has said smartphones and computer screens create “an epidemic of disconnection” within families.
Kate’s words – in an essay co-written with a Harvard professor – come ahead of a visit to Oxford to highlight her work on early years education and support.
In the piece, she says that “while new technology has many benefits, we must also acknowledge that it plays a complex and often troubling role in this epidemic of disconnection”.
“While digital devices promise to keep us connected, they frequently do the opposite,” writes the princess.
“Our smartphones, tablets, and computers have become sources of constant distraction, fragmenting our focus and preventing us from giving others the undivided attention that relationships require.”
Emphasising how she believes technology can interfere in family life, she adds: “We sit together in the same room while our minds are scattered across dozens of apps, notifications, and feeds.
“We’re physically present but mentally absent, unable to fully engage with the people right in front of us.
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“This technological interference strikes at something fundamental: our undivided attention is the most precious gift we can give another person. Yet, increasingly, it’s the most difficult gift to offer.”
The Prince and Princess of Wales have previously spoken about the potentially harmful effects of social media.
Image: Kate says technology is increasingly interfering in family life
In a recent interview, Prince William revealed that their three children, George, Charlotte and Louis, currently don’t have mobile phones, and that they try to have dinner together.
Kate’s essay, titled The Power of Human Connection in a Distracted World, was released by her Royal Foundation Centre for Early Childhood and written in collaboration with Professor Robert Waldinger.
Kate first met the Harvard academic in 2022 and he’s worked closely with the Royal Foundation ever since.
“We live increasingly lonelier lives, which research shows is toxic to human health, and it’s our young people (aged 16 to 24) that report being the loneliest of all, the very generation that should be forming the relationships that will sustain them throughout life,” write the princess and the professor.
Later today, the princess will visit Home‑Start Oxford to meet volunteers and families, and talk about how they are using resources and films produced by the Centre for Early Childhood to help parents and children.
A murderer who threw “prison napalm” over a man before stabbing him in the heart has been jailed for at least 20 years.
Gavin Gallagher, 33, claimed he was acting in self-defence when he launched the boiling water and sugar mix over Stephen Gray, 23, before knifing him.
However, he was convicted of murder and accused of staging the crime scene in an attempt to cover his tracks.
In his sentencing statement, Judge Lord Mulholland told Gallagher: “I was not surprised that the jury rejected self-defence and provocation.
“It seemed to me that your defence of self-defence was staged, and your lies unravelled.”
Image: Stephen Gray. Pic: Police Scotland
The fatal attack occurred at a block of flats in Glasgow’s Southcroft Street on 3 November 2023.
Lord Mulholland said Mr Gray was bare chested when Gallagher threw the boiling water and sugar mix over him.
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The concoction is often referred to as “prison napalm” due to being used by inmates during assaults.
The judge said the vast majority of burns were to Mr Gray’s back.
Lord Mulholland said: “He was bare chested, and the burns caused by what you did must have been very painful. You can see that from the photographs of his injuries.”
Gallagher then stabbed Mr Gray twice with a large kitchen knife.
The judge said: “One of these blows penetrated his heart and caused massive bleeding which led to his death. This injury was unsurvivable.
“You then did what you could to set up a defence of self-defence in an attempt to cover your tracks.
“You placed a knife alongside his dying body and said to a neighbour that it was the deceased’s knife.
“You told anyone who would listen that you killed him in self-defence.”
Gallagher was convicted of murder at the High Court in Glasgow last month.
He returned to the dock for sentencing on Wednesday, when he was handed a life sentence with at least 20 years in jail.
Detective Superintendent Hannah Edward said: “Our thoughts remain with the family and friends of Stephen and while we know nothing can change what has happened, I hope this brings them some degree of closure as they try to move forward.
“This was a shocking attack and Gallagher will now face the consequences of his despicable actions.”