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Chronicles

The story behind the story

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Popular health websites in UK are sharing sensitive user data with dozens of companies including Google and Facebook along with data-brokers and adtech firms

Some of the UK's most popular health websites are sharing people's sensitive data — including medical symptoms, diagnoses …

Financial Times

Context & Ripple Effects

This FT finding is not a first sighting but a recurrence: back in 2015, Motherboard reported that a majority of health sites were already shipping medical-search data to third parties, and four years later the practice persists at the UK's most-visited health destinations, now with named recipients including Google, Facebook, data brokers and adtech firms.

The wider corpus shows why the leak matters beyond advertising: England's NHS has since moved to pool medical histories of 55M people for third-party sharing, and an investigation found Biobank passed ~500K volunteers' health data to insurers despite pledging not to — a pattern where sensitive UK health data keeps reaching parties patients never chose.

First-order effects

  • Google, Facebook, data brokers and adtech firms are receiving symptom and diagnosis-level data from some of the UK's most popular health websites, giving them sensitive audience signals no consent banner explicitly framed.

Second-order effects

  • The named platforms face pressure to police or cut these tracker integrations, while health publishers must choose between adtech revenue and GDPR exposure as regulators scrutinize who else touches the data.

Third-order effects

  • With NHS bulk-sharing plans and the Biobank pledge-breach stacking on top of website leaks, UK health data is heading toward stricter consent regimes and opt-out battles as the default trust model for secondary use collapses.

The trend: Sensitive UK health data keeps migrating from patient-controlled contexts into commercial pipelines — websites, national datasets, research biobanks — faster than pledges and oversight can contain it.

Discussion

  • @financialtimes @financialtimes on x
    An FT investigation has shown that people's most sensitive health data, including their medical symptoms, diagnoses and period and fertility information, are being traded with dozens of companies around the world, including Google, Amazon and Facebook https://www.ft.com/... https…
  • @jolyonmaugham Jo Maugham QC on x
    How top health websites are sharing sensitive data with advertisers. Bravo to the FT for this extraordinary reporting. https://giftarticle.ft.com/... https://twitter.com/...
  • @missig_geek Miss IG Geek on x
    Developers aren't taught about eprivacy law. They should be. Clients don't stipulate privacy compliance in deliverables. They should do. https://twitter.com/...
  • @carolecadwalla Carole Cadwalladr on x
    Ugh. Ever checked out your symptoms? Fertility? Asked questions about abortion? The toxic data swamp now has them. And knows exactly you are. The ramifications of this are huge. Important new data investigation from @ft https://www.ft.com/...
  • @ukskies @ukskies on x
    No one should have the right to ‘own’ or sell your data, but here we are, you've given it away for free. Perhaps we should copy the music industry, so every time someone accesses your data you're paid a royalty. https://twitter.com/...
  • @aaschapiro Avi Asher-Schapiro on x
    When people search “drug overdose” on WebMD, the site secretly shares the data w/Facebook, which can use it to track the searcher around the internet. One of many big revelations in this @FT investigation into how ad tech works on medical websites: https://www.ft.com/...
  • @stilldelvingh @stilldelvingh on x
    Being online is like having someone behind you all the time, writing down every single thing you say and do to sell that to whoever is willing to pay. Would the unvirtual equivalent be deemed acceptable? https://twitter.com/...