If we could reach back through seven decades of London fog (the metaphorical kind, not the coal-choked variety), we might find E.T. Wilkins at his desk in the Department of Scientific and Industrial Research, plotting death rates on graph paper while the government insisted there was nothing to see here.

As Officer in Charge of Atmospheric Pollution—a title that sounds like something from a Terry Pratchett novel but was, tragically, real—Wilkins spent the winter of 1952-53 counting corpses that officially didn't exist. The following conversation is reconstructed from historical records of his work, the government's response, and the peculiar hell of being the only person in the room who can do basic arithmetic.

You had perhaps the most grimly ironic job title in government service. What did "Officer in Charge of Atmospheric Pollution" actually mean in 1952?

Wilkins: It meant I was in charge of measuring something nobody particularly wanted measured.

The Department of Scientific and Industrial Research had this pollution monitoring program, very serious, very thorough, and my job was to track smoke particles, sulphur dioxide levels, that sort of thing. We'd been doing it for years. The data went into reports that I suspect very few people read. It was the kind of position where you could have a perfectly respectable career watching numbers go up and down without anyone paying much attention.

Then December 1952 happened, and suddenly everyone was very interested in my graphs.

Well. Not everyone. The government remained remarkably uninterested.

Walk me through those first days. When did you realize this wasn't just another pea-souper?

Wilkins: The color was wrong. That's the first thing. Friday, December 5th, it started building. By Saturday, visibility was down to a few feet in places. Londoners were accustomed to fog—we'd had centuries of it—but this was greenish-yellow from the tar particles. And it was inside buildings, creeping under doors, through cracks. People couldn't see their own feet on the pavement.¹

I was tracking the pollution readings. On each day of the fog, we were seeing 1,000 tonnes of smoke particles, 370 tonnes of sulphur dioxide being converted to 800 tonnes of sulphuric acid.² The chemistry was straightforward: cold air trapped under warm air, temperature inversion, nowhere for the smoke to go. Every coal fire in London pumping pollutants into essentially a closed room.

But the real indicator? The undertakers ran out of caskets. The florists ran out of flowers. That's when you know something has gone very wrong—when the infrastructure of death can't keep up.

You started plotting death rates against the pollution data.

Wilkins: That we'd killed about 4,000 people in five days. And that was just the beginning.

The initial government estimate was 4,000 deaths during the event itself, December 5th through 9th. Most from respiratory failure, bronchopneumonia, chronic bronchitis suddenly turning acute. But I kept plotting. December turned to January, January to February, February to March. The death rate stayed elevated. People who'd survived the initial event were dying weeks, months later from lung damage, from infections their damaged respiratory systems couldn't fight off.³

And the government's response to your findings?

Wilkins: To suggest I might be mistaken.

Or that perhaps these deaths were due to influenza. Or that correlation wasn't causation. The initial response in January 1953 was to deny any responsibility or need for new legislation, despite the London County Council producing a report clearly detailing the appalling effects.⁴

It's remarkable, really, how creative people become when confronted with data they don't want to believe. I had the numbers. I had the death certificates. I had the atmospheric pollution readings. The chemistry was undeniable—when you burn that much coal in a closed system, you create sulphuric acid mist that people breathe into their lungs. This wasn't theoretical. This wasn't a model. This was bodies.

But admitting that would mean admitting that British energy policy—61 percent of London's energy from coal, most of it low-grade domestic coal because we'd exported the good anthracite to pay off war debts—had killed 12,000 Londoners.⁵

Much easier to blame influenza.

There's a particular kind of loneliness in being the person with the data nobody wants to hear.

Wilkins: You keep checking your work. That's what you do.

You go back through the calculations again and again, because surely you've made an error. Surely the death rate couldn't actually be this high. Surely someone else is seeing what you're seeing.

But the mathematics doesn't change. The death certificates don't un-sign themselves. And gradually you realize that the problem isn't your data. The problem is that accepting your data would require action, and action would require admitting fault, and admitting fault would be politically inconvenient.

So you become the person at meetings who everyone wishes would stop talking about the corpses.

Did you ever consider not publishing the full numbers?

Wilkins: Of course I considered it. I'm not a martyr. I had a career, a pension to think about. And there were plenty of people who would have been happier if I'd stopped at 4,000 deaths and moved on.

But those 8,000 additional deaths I counted? They were real people. They had names. Families. Someone's grandmother who survived the war and the Blitz only to be killed by her own coal fire. Someone's infant with lungs that couldn't handle the acid mist.

You can't just decide those don't count because it would be awkward to count them.

And frankly, I was angry. We'd known for years that London's air was filthy. John Evelyn wrote about it in 1661, for God's sake.⁶ We'd had centuries to address this. The data had been there. We just chose not to look at it until it became impossible to ignore.

The Clean Air Act didn't pass until 1956. Four years after the smog.

Wilkins: Excruciating. That's what those years were.

In 1954, the City of London banned smoke in the Square Mile—two years after 12,000 deaths. The Clean Air Act came in 1956, establishing smoke-free zones, restricting coal burning in homes and factories.⁷ Four years.

And in 1962, we had another smog event that killed 750 people.⁸ Not as bad as 1952, but still. Seven hundred and fifty preventable deaths because we were "giving people time to adapt to the new rules."

I understand the practical challenges. You can't just tell people to stop heating their homes overnight. The government offered grants to switch to oil, gas, electricity. But every month of delay was more deaths that didn't have to happen.

You're asking me to be reasonable about the pace of bureaucracy when I'm the one counting the bodies.

What parallels do you see to current climate challenges?

Wilkins: bitter laugh

All of them. Every single one.

You have scientists with clear data showing a crisis. You have governments saying "well, we need more research" or "the models might be wrong" or "we can't act too hastily." You have the cost of inaction mounting daily while everyone debates the cost of action. You have the people most affected—the ones who can't afford to move, can't afford new heating systems or air conditioning or flood insurance—being told to be patient while policy catches up to reality.

The only difference is scale. I was tracking deaths in one city over months. Climate scientists are tracking deaths globally over decades. But the fundamental dynamic is identical: clear data, clear causation, and a desperate desire not to look at either because looking would require uncomfortable changes.

What would you tell someone in your position today? A scientist with data nobody wants to hear?

Wilkins: Keep counting. Keep publishing. Document everything.

Because eventually—and it may take years, it may take thousands of unnecessary deaths—eventually the reality becomes impossible to deny. The fog lifts, metaphorically speaking, and people see what was always there.

And when that happens, you want your data to be unimpeachable. You want your methodology documented. You want to be able to say: I told you. I showed you. The numbers were always there. You just didn't want to look.

It won't make you popular. It won't make the delay hurt less. But it means that when change finally comes, it's built on solid ground rather than convenient fiction.

He stops, looks past me at something I can't see.

The numbers were right. But maybe the numbers weren't enough.

That's the real lesson, I think. Being correct isn't sufficient. You have to make people feel the weight of being correct. You have to make the dead count for something.

Footnotes

1. https://www.londonmuseum.org.uk/collections/london-stories/the-great-smog-of-1952/ ↩

2. https://cleanair.london/policy/great-smogs-70th-anniversary-take-action/ ↩

3. https://en.wikipedia.org/wiki/Great_Smog_of_London ↩

4. https://cleanair.london/app/uploads/CAL-217-Great-Smog-by-GLA-20021.pdf ↩

5. https://cleanair.london/app/uploads/CAL-217-Great-Smog-by-GLA-20021.pdf ↩

6. https://en.wikipedia.org/wiki/Great_Smog_of_London ↩

7. https://www.londonmuseum.org.uk/collections/london-stories/the-great-smog-of-1952/ ↩

8. https://weather.metoffice.gov.uk/learn-about/weather/case-studies/great-smog ↩