This might be the most impactful thing you can do, but it’s potentially a bit of a slog.
Old news releases, superseded service pages, last year’s PDFs, archived consultations. They sit on your site doing nothing, except when an AI tool finds them and quotes them as current.
Content designers at the Department for Business and Trade found exactly this happening on GOV.UK. A Google AI Overview was telling people it costs £40 by post or £13 online to set up a charity in the UK. The actual cost, since February 2026, is £124 by post or £100 online. The primary guidance page had been updated, but the AI found an unmaintained legacy page with the word “charity” on it and quoted that instead. As one user research participant put it: “What else does government have out there that is ‘designed to trip you up’?”
DBT’s response was to audit their content estate and identify 150 pages that hadn’t been updated in five years, had fewer than 11 views, and had no current owner. They didn’t just add “this page is out of date” banners, because user research showed people skip them and AI bots ignore them entirely. Instead, they redirected every page to either its National Archives version, a current GOV.UK page, or the underlying legislation. You can read their full approach on the GOV.UK digital trade blog.
That’s 150 pages from one department. GOV.UK alone has over 700,000 published pages. And every public sector organisation has its own version of this problem. Councils with old cabinet reports still indexed. NHS organisations with pre-reorganisation service pages. Schools with last year’s admissions guide as a PDF. Charities with COVID-era donation pages still live, listing restrictions that ended two years ago. Transport providers with timetables from the last franchise.
Local Government Reorganisation is about to make this worse. As councils merge, there will be thousands of pages referring to authorities that no longer exist, services that have moved, and contact details that have changed. AI will keep quoting them until someone unpublishes or redirects them. If you, or your comms lead for the change, can flag this as a risk during the process, you’ll be a step ahead of the issue.
Practical steps:
- Audit your site for pages that haven’t been reviewed in 12 months or more. Most CMS platforms can generate this list.
- Either update, redirect, or unpublish. If a page is genuinely historical (a news release, a past consultation), add a clear banner: “This page is from [date] and may not reflect current information.”
- PDFs are the worst offenders because they’re harder to update and often sit outside your CMS review cycle. If a PDF contains information that changes annually (prices, dates, eligibility), consider replacing it with a web page you can keep current.
- Your old content isn’t just clutter. It’s a competing source of information, and AI might be treating it as your official position.
How do you know it’s working?
The simplest way is to re-run the audit. Pick the same ten questions quarterly and compare what AI says now against what it said last time. If your fixes have landed, you’ll see your own pages being cited where Reddit or old news articles were before.
If you want to go further, check your analytics. GA4 can show referral traffic from AI sources, including ChatGPT, Perplexity, and Google’s AI Overviews. The data isn’t perfect yet, but it gives you a rough picture of how much of your traffic is now AI-mediated and whether people are landing on the right pages. The DBT content team is doing exactly this, tracking how their content appears in AI answers before and after changes, and it’s how they’re building the case for ongoing investment in content maintenance.
This doesn’t need to be complicated. A quarterly audit, a glance at your referral sources, and a note of what’s changed. That’s enough to show progress and make the case for keeping it going.