Air Pollution

James Naish Excerpts

Thursday 2nd July 2026 Westminster Hall

[Barry Gardiner (Brent West) (Lab)]

I beg to move,

That this House has considered Government plans to tackle air pollution.

It is a pleasure to serve under your chairship, Mr Efford. There is no safe level of air pollution. I will say that again: there is no safe level of air pollution. Of course, life is not risk-free. Every year, almost 250 people die from knife crime and, rightly, people demand action. Every year, almost 1,600 people die in road traffic accidents and, rightly, people demand action. Every year, approximately 43,000 people die prematurely from air pollution, yet there is silence. Well, no more—the public are finding their voice about this silent, invisible killer. This morning in Parliament Square, doctors, nurses, academics, carers, mothers and babies came together with the Healthy Air Coalition, the National Heart and Lung Foundation, Mums for Lungs, trade unions, and Asthma + Lung UK to demand that Parliament act. Eighty-two of them represented the 82 people whose lives are cut short by air pollution every day.

We have a public health emergency on our hands and the response from successive Governments so far has simply not been adequate. We have no co-ordinated national plan to get key pollutants down to safer levels that are aligned with the World Health Organisation limit values. Sadly, the annual data released this week shows that things are going in the wrong direction. Two days ago, the Department for Environment, Food and Rural Affairs published new air quality statistics for 2025; note the words “air quality”—it should be “air pollution” statistics. It found that

“annual mean concentrations of PM2.5 showed an increase of 12 per cent at urban background stations and an increase of 14 per cent for roadside stations compared to 2024.”

It also found that

“annual mean concentrations of PM10 showed an increase of 12 per cent for urban background stations and an increase of 8 per cent for roadside stations compared to 2024”

and that annual mean concentrations of nitrogen dioxide increased by

“3 per cent at urban background stations”

although they did show a 1% decrease at roadside stations.

I hope that everyone notices the irony that DEFRA insists on calling this “air quality” instead of air pollution. Let us be clear about the health impacts of air pollution. Polluted air is linked to up to 43,000 deaths in the UK every year. Let us imagine the reaction if a new covid variant was having such an impact. Imagine if knife crime was linked to hundreds of deaths every week, or if we saw 82 deaths on our roads every single day. Air pollution is the second leading risk factor for death in children under five and it is the largest environmental risk to public health, yet it remains the silent killer—the invisible killer—because it is often masked by other diseases that it has aggravated. We have had just one case where the coroner’s certificate reports air pollution as a cause of death: that of Ella Adoo-Kissi-Debrah, where the coroner concluded that Ella had

“died of asthma contributed to by exposure to excessive air pollution.”

He said it “made a material contribution” to her death. I pay tribute to Ella’s mother, Rosamund, and to all those who have campaigned for clean air as a human right. Rosamund was in Parliament Square this morning with all those campaigners. The work that she has done to bring this matter to public consciousness should be respected by everyone in Parliament.

Scientists have found links between air pollution, almost every organ system in the body and the major diseases that affect them. That includes the brain, lungs, cardiovascular system, kidneys, liver, gastrointestinal tract, bones, skin, reproductive system and even the central nervous system, where air pollution increases the chance of developing dementia. The current health evidence, based on more than 60,000 studies, links air pollution to more than 700 illnesses.

Although the scientific evidence base grows every year, we know more than enough to realise that current efforts fall far short of what is needed. Indeed, here is what we know about the state of air pollution in the UK: air quality targets and the legal air pollution limits are not sufficient to protect public health. There is no Government-wide action plan to bring down levels of air pollution to below World Health Organisation guidelines. Funding and resources for local authorities to deliver air quality programmes are inadequate, and public awareness of outdoor and indoor air pollution is far too low.

Seventy years ago this month, when the UK published the Clean Air Act 1956—the first Act of its kind—we really were a world leader in tackling air pollution. We can no longer make that claim. After the great smog that killed 4,000 people in a week—with a total death count estimated at 10,000 to 12,000 in the penumbra—the Government passed the 1956 Act. Politicians then rose to the challenge. Today, they must do so again. Other jurisdictions are moving ahead with more ambition and urgency. Before we consider doing that, we should distinguish between a target and a limit value.

The Government are fond of setting targets. A target is something that is aimed for. A limit value is a threshold that should not be crossed. In 2021, the WHO updated its guidance for one of the key pollutants: PM_2.5. Its guidance is a level of no more than 5 micrograms per cubic metre. The UK’s legal limit value was set in the Air Quality Standards Regulations 2010; it remains four times higher than the WHO value, at 20 micrograms per cubic metre—that is the legal limit.

The recent environmental improvement plan introduced a new date to achieve a target of 10 micrograms per metre cubed: 2030—it had been 2040. That sounds like good news, a target that will be achieved 10 years earlier, but do not be fooled. The target for PM_2.5—that is, the aspiration rather than the legal limit—is still double the WHO guideline. It actually represents no progress at all. In DEFRA’s 2024 monitoring data, all but one monitoring site just met the 10 microgram target. Those are the sort of targets that DEFRA loves: ones where nothing has to be done to achieve them and everything can be left as bad as it has always been, but it looks as though action is being taken.

We need not a target, but a legally binding limit value that is the same as the WHO’s guideline of 5 micrograms per metre cubed. We need a wider plan to get PM_2.5 exposure down across the UK to below WHO guidelines in the near future. The same and more can be said of the nitrogen dioxide target. On that, the WHO guidelines are 10 micrograms per cubic metre, but the UK lags behind with a legal limit value set in 2010 at an annual exposure of 40 micrograms. When it comes to nitrogen dioxide, the Environment Act 2021 did not even set a long-term target, so action on that key pollutant is not included in the Act’s delivery plan.

It makes no sense for the Government to treat nitrogen dioxide any differently from PM_2.5. We should have a far tighter limit value and a far more ambitious plan for driving nitrogen dioxide levels down to below WHO guidelines. On our current trajectory, some parts of the UK will not be compliant with the current inadequate limit value of 40 micrograms until 2045. My right hon. Friend the Member for Makerfield (Andy Burnham) will be aware that the latest DEFRA figures show that Manchester has the worst nitrogen dioxide pollution in the country, with a level of 55 micrograms per cubic metre—more than five times the WHO guidelines. As a result, it is thought that air pollution contributes to one in 20 deaths in the region each year.

Moreover, national-level statistics can mask local authority-level data, as exposed by the work of Asthma + Lung UK. Its research found that local authorities are breaching the legal limits of nitrogen dioxide, even when national Government have determined them to be under such limits. That is because of the disjointed approach we currently take to air pollution, in which national data weirdly excludes local authority monitors despite local authorities being mandated by the Government to collect data.

So we have situations such as the one in my Brent West constituency, where three local authority monitors accurately record illegal levels of nitrogen dioxide despite the Government saying that Brent, and London as a whole, supposedly meet legal limits for nitrogen dioxide. At the corner of Wembley High Road and London Road, the annual mean for nitrogen dioxide was 40.92 micrograms per cubic metre; at the corner of Wembley High Road and Ealing Road, it was 41.76; at the junction of Forty Lane and Kings Drive, it was 43.5. Each of those is more than four times the WHO guidelines, and each is right next to or in walking distance of a school. This is toxic, illegal air pollution that my constituents are exposed to, yet if they read what the Government say, they would not even realise it.

[James Naish (Rushcliffe) (Lab)]

This week, Nottingham University hospitals NHS trust declared a “critical incident” after prolonged extreme heat led to increased demand, with more patients suffering dehydration and heat-related illnesses. As my hon. Friend will know, hot spells often go hand in hand with poor air quality. Does he agree that there is an imperative to address poor air quality, and that that imperative is growing as a result of the changing climate?

[Barry Gardiner]

My hon. Friend makes an excellent point, and he is absolutely right. The heat dome that we have been experiencing interacts with pollution and gives us extra ozone and causes huge health problems. I do not know—perhaps the Minister can tell us, if his officials are on the ball on this—just when the number of excess deaths caused by last week’s high temperatures will be known at a disaggregated level; it would be extremely interesting to get those.