Stuart McDonald

@actuarybyday.bsky.social

Analysis of health and mortality data. Actuary. Partner at LCP. Chair of the CMI. MBE for services to Public Health.

It looks like there may have been around 1,000 additional deaths in England and Wales during the August heatwave. The chart shows deaths occurring in each week of 2025 and 2026. I've added an estimate of deaths which have not yet been registered, and marked heatwave weeks with red borders. 1/3

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By way of illustration, look how clearly the heatwave stands out in week 33 of 2025. Then note that deaths have been at that same level in four of the last five weeks. The simplified 5-week average I’ve used as illustration here doesn’t work well when heatwaves keep coming week after week.

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Stuart McDonald@actuarybyday.bsky.social · 2mo ago

Although the early July heatwave (week 28-29) does not look remarkable against the 5-week average, it is worth noting that deaths were about 5% higher (500 a week) compared to 2025. That's a bigger increase than expected from population ageing, when we might have expected a dip after June peak. 4/4

ANNOUNCEMENT: All our sundials will be out of order this evening between about 6pm and 8pm, we apologise for any inconvenience this may cause. Normal service will resume tomorrow. In unrelated news, enjoy the eclipse later... Photos: Mike Selby, Annapurna Mellor, Chris Davies, John Millar

A wall-mounted sundial inside a walled garden. Text on the sundial reads: "fear god, obey ye king"A traditional sundial on a plinth, formal gardens surround itThe sun beams down on a traditional sundial, with heather visible in the backgroundA shot of a sundial from above. It's mounted on a stone plinth. Text on the side reads "KEW BRIDGE"

An update on the impact of the summer heatwaves on deaths in England & Wales. The chart shows deaths occurring in each week of 2025 and 2026 in dark blue. I've added an estimate of deaths which have not yet been registered in lighter blue, and marked heatwave weeks with red borders. 1/4

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Burnham announces: 1. Casey will bring forward her review by a year to summer 2027. He wants it to focus on creating a National Care Service that is ‘highly integrated’ with the NHS. 2. He will look at improving pay and progression of social care workforce. 3. Cross party talks to begin today.

I'm interested in finding and potentially supporting people who are interested in doing long-form writing on the big efforts in global health: Gavi, Global Fund, PEPFAR, etc. If this is you or someone you know, please make yourself known!

With each passing week the impact of the summer heatwaves on deaths becomes clearer. The chart shows deaths occurring in each week of 2025 and 2026 in dark blue. I've added an estimate of deaths which have not yet been registered in lighter blue, and marked heatwave weeks with red borders. 1/4

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With the release of today's data the impact of the UK summer heatwaves is becoming increasingly clear. Deaths were unusually high for the time of year during the May and June heatwaves, and unusually low during the weeks in between. Need to wait a few more weeks to see the impact of July heatwave.

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News outlets are leading with modelling suggesting 2,700 people may have died from heat-related causes during recent heatwaves. And yet recent death rates are the lowest on record. A short thread on what recent mortality data actually tells us. Spoiler: not much! 1/5 www.bbc.co.uk/news/article...

Thousands will have died in UK's unprecedented May and June heatwaves

An early estimate suggests more than 2,700 people will have died from heat-related causes during the UK's exceptionally hot weather in recent months.

bbc.co.uk

How long are you likely to live? And what are your chances of making it to 100? Today ONS published projections of life expectancy (LE) by age and sex. That means an update to their interactive LE calculator. Enter your age and sex for your LE, chance of making it to pension age, age 90 and 100.

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Deaths rates in 2026 remain remarkably low, well below 2025's record low. Interesting question for actuaries is the extent to which this is indicative of the future, or whether the loss of the most frail during the pandemic means that rates are artificially low at the moment. Good news anyway!

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A landmark day! The Tobacco and Vapes Bill received Royal Assent. It is now illegal to sell tobacco to anyone born from 2009. Our analysis found that 18-year-olds who never smoke could spend around a decade longer in good health than those who start smoking at 18 and remain lifelong smokers.

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Today’s ONS projections show the UK population ageing further over the next decade, with pensioner numbers rising faster than the working-age population even after State Pension age increases to 67. That will add to pressure on the NHS, the State Pension and the wider public finances.

National population projections - Office for National Statistics

The potential future population size of the UK and its constituent countries. These statistics are widely used in planning, including fiscal projections, health, education and pensions.

ons.gov.uk

Death rates for cervical cancer in the United Kingdom have fallen by 80% since 1950— Cervical cancer death rates among women in the United Kingdom have fallen by around 80% since 1950. You can see this reduction in the chart. This progress happened for a couple of key reasons.

Line chart of reported cervical cancer deaths per 100,000 women in the United Kingdom from 1950 to 2021 where the rate falls from about 8.6 deaths per 100,000 in 1950 to about 1.7 in 2021, an approximately 80% decline.

What's one of the best ways to measure population health? We'd argue it's Healthy Life Expectancy - capturing not just how long we live, but how many of those years are spent in good health. New figures are out today. The picture isn't good. At a national level, England's HLE continues to fall.

A graph showing a negative trend in HLE