Google Algorithm Updates 2026: What Changed and How It Affects Your London Business

June 22, 2026

Google has already pushed two major core algorithm updates in 2026 — the March 2026 Core Update (27 March – 8 April) and the May 2026 Core Update (21 May – 2 June). Both caused the kind of ranking volatility that keeps SEO professionals up at night. If your London business website lost traffic in spring 2026, one or both of these updates is very likely the reason.

This guide breaks down exactly what changed, who won, who lost, and what you need to do to protect and recover your rankings.

Timeline: Google’s 2026 Algorithm Updates So Far

Before diving into what changed, here is the confirmed timeline of major Google updates in 2026:

March 2026 Spam Update — completed 24–25 March, targeting manipulative link schemes and scaled content abuse
March 2026 Core Update — 27 March to 8 April, one of the most disruptive core updates on record
May 2026 Core Update — 21 May to 2 June, described by Google as a continuation of the March direction

The back-to-back nature of the March spam and core updates created compounding volatility. Sites that were propped up by weak backlinks got hit first by the spam update, then reassessed — often more harshly — by the core update days later.

What the March 2026 Core Update Actually Changed

Google did not introduce new ranking signals in March 2026. What changed is how existing signals are weighted — and how aggressively Google now differentiates between content with genuine value and content that simply exists to rank.

The March 2026 Core Update drove some of the highest ranking volatility on record, with roughly 80% of top-three results shifting, and nearly 1 in 4 top-10 pages falling out of the top 100 entirely.

Three shifts stand out from the data:

1. E-E-A-T Is Now a Hard Ranking Factor

Experience, Expertise, Authoritativeness, and Trust have been part of Google’s quality guidelines for years. In 2026, they are measurable ranking factors with direct, observable impact on positions. Sites that publish original research, include proprietary data, feature expert commentary, and demonstrate genuine first-hand experience saw an average visibility gain of 22% according to Ahrefs tracking data.

For London businesses, this means your website content needs to demonstrate real expertise. A dental clinic writing about dental procedures, a piling contractor explaining ground conditions, a removal company describing packing techniques — this kind of first-hand content is exactly what Google is now rewarding. Generic summaries copied or rewritten from other sources are losing ground fast.

2. Content That Just Aggregates Is Losing

The biggest losers were often broad aggregators, thin comparison pages, some user-generated content surfaces, generic affiliate pages, and sites that mostly repackaged information from stronger sources without adding much new value.

This is a significant shift. For years, well-structured content that organised existing information clearly could rank strongly. That model is now under pressure. Google is increasingly rewarding pages that are the original source of the answer — not the third-party layer between the searcher and the source.

3. AI-Generated Content Without Human Oversight Is Being Penalised

The March 2026 core update did not ban AI-generated content. What it penalised was content produced at scale without meaningful human editorial oversight and with no genuine information gain — regardless of whether that content was written by AI or humans.

This is an important distinction for business owners. Using AI tools to assist with content is fine. Publishing hundreds of AI-generated pages without review, original data, or genuine expertise is what is getting sites hit.

The May 2026 Core Update: More of the Same

Google has framed the May 2026 Core Update as a regular update designed to better surface relevant, satisfying content for searchers across all types of sites. No new ranking systems were introduced, and Google has not issued guidance specific to this update beyond pointing site owners back to its existing recommendations on helpful, people-first content.

In practice, the May update reinforced the direction established in March. Sites that improved after March continued to gain. Sites that did not address the underlying content quality issues saw further declines.

Winners and Losers: What the Data Shows

Who Gained

The most commonly cited winners were official institutions, government sources, direct brands, specialist publishers, and pages with clear original value. In multiple verticals, the sites closest to the underlying source of information appeared to gain.

For local London businesses, the lesson is clear: being the definitive source for your specific service in your specific area is more valuable than trying to rank for broad national terms with generic content.

Who Lost

The clearest losers across both updates were:

Sites with thin, keyword-swapped, or templated content — particularly those using the same structure across dozens of location pages
Aggregators and comparison sites that add little beyond organising third-party information
Pages with no identifiable author or company credibility signals
Sites with poor Core Web Vitals, especially slow mobile performance
Businesses with weak or manipulative backlink profiles that were also caught by the March spam update

The AI Overviews Problem: Why Ranking #1 Is No Longer Enough

The 2026 updates cannot be discussed without addressing AI Overviews — Google’s AI-generated summaries that appear above organic results for a growing percentage of searches.

AI Overviews now appear in 25.8% of all US searches. When an AI Overview is present, the top organic result’s click-through rate drops from 28.5% to 11.2% — a roughly 60% decline.

For London businesses targeting informational queries — “how much does SEO cost”, “what is local SEO”, “how long does SEO take” — this is a significant shift. You can rank number one and still receive dramatically fewer clicks than you did two years ago.

The solution is not to abandon SEO. Ranking in the top 10 is the price of admission — 92.36% of AI citations come from page-one results. But you also need to structure your content so Google’s AI will cite it directly inside the Overview.

Practically, this means:

Clear, direct answers to specific questions early in the page
FAQ sections with concise, well-structured responses
Proper heading structure (H2, H3) that signals the topic of each section
Original data, statistics, or insights that are worth citing
Content that demonstrates first-hand experience, not just research

What To Do If Your Rankings Dropped

If your website lost traffic or rankings after the March or May 2026 updates, here is a practical recovery plan based on what the data shows is working:

Step 1: Diagnose Before You Act

Open Google Search Console and filter by date range — compare March 27 to April 8 against the two weeks before. Identify which specific pages lost the most visibility and which queries dropped. This tells you whether the issue is site-wide or concentrated on specific content types.

Step 2: Audit for E-E-A-T Signals

For each page that dropped, ask honestly: does this page demonstrate real expertise? Is there an identifiable author with genuine credentials? Does the content contain original insights, data, or first-hand experience — or does it simply rephrase what other sites already say? Pages that cannot answer “yes” to these questions need rewriting, not just tweaking.

Step 3: Fix Core Web Vitals

Technical performance is not glamorous, but it matters. Interaction to Next Paint (INP) has become a key performance signal, surpassing traditional metrics like Largest Contentful Paint. Sites with slow interactivity, heavy scripts, or poor frontend optimisation are experiencing ranking drops. Run your site through Google PageSpeed Insights and address the highest-impact issues first.

Step 4: Consolidate Thin Pages

If your site has multiple similar pages targeting the same or overlapping keywords — common with location-based service pages — consider merging them into single, authoritative pages. A single strong page about “SEO services in North London” will outrank three thin pages targeting nearby areas.

Step 5: Build Genuine Backlinks

The March spam update specifically targeted manipulative link schemes. If your backlink profile includes paid links, link farms, or irrelevant directories, these need to be disavowed. Focus instead on earning links from genuinely relevant sources — industry publications, local business organisations, suppliers, and partners.

Step 6: Publish Better Content, Not More Content

The clearest message from both 2026 core updates is that volume is not the answer. The sites that will thrive are the ones that treat every piece of content as a reflection of their genuine expertise and are willing to publish less but publish better. One well-researched, expert-written article that answers a specific question thoroughly is worth more than ten thin posts targeting similar keywords.

What This Means for London SMEs Specifically

Local SEO for London businesses is increasingly competitive. The 2026 updates have not changed what works — quality content, technical health, genuine authority, and consistent link building. What has changed is the bar.

For small and medium businesses in London, the opportunity is real. Large national competitors often have thousands of thin, templated pages that were exactly the kind of content penalised in 2026. A smaller, locally-focused business with well-written, expert content that genuinely serves its target audience is now better positioned than it was two years ago.

The fundamentals of local SEO remain: a well-optimised Google Business Profile, location-specific content that demonstrates genuine knowledge of your service area, quality backlinks from local and industry sources, and consistent monthly SEO work that responds to algorithm changes as they happen.

Summary: Key Takeaways from Google’s 2026 Updates

Two major core updates in 2026 (March and May) caused the highest ranking volatility in years
E-E-A-T is now a measurable ranking factor — not just a guideline
Content that aggregates, rephrases, or lacks original value is losing ground
AI-generated content is not banned — low-quality, unreviewed, undifferentiated content is what is being penalised
AI Overviews are reducing click-through rates even for #1 rankings — structure your content to be cited
Recovery requires improving content quality, not panic-editing or deleting pages
Local businesses with genuine expertise are well-positioned if they invest in proper SEO

If you are unsure how the 2026 Google updates have affected your website, request a free SEO audit from Alfamedio. We will identify exactly where your site stands and what needs to change to recover and grow your rankings in 2026.

Kamil

Kamil Krystman is an SEO expert with 13 years of experience. In 2013, he founded Alfamedio LTD based in London.

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