There is a quiet problem affecting the vast majority of UK plumbing and heating businesses, and most owners have no idea it exists. Across the web - on sites like Yell, Yelp, Thomson Local, Checkatrade, and dozens of other directories - your business is presenting incorrect information to potential customers and, more importantly, to the algorithms that decide whether to recommend you.

We audited 23 UK plumbing and heating businesses in early 2026. The average score for online listings accuracy was 25.8%. That means, on average, three quarters of the information these businesses present across the web is wrong, incomplete, or inconsistent. Nineteen of the 22 businesses with listings data had accuracy scores below 30%.

What "Inaccurate Listings" Actually Means

When we talk about directory listings, we are referring to any place online where your business name, address, and phone number appear. This includes the obvious ones - Google Business Profile, Yell, Yelp - but also dozens of less prominent directories that you may never have heard of: Cylex, Hotfrog, Brownbook, FreeIndex, and many more.

Inaccuracy takes several forms. The most common is an old phone number - perhaps from before you changed your number, or from when you first set up the business. Address discrepancies are also common, particularly if you have moved premises or if your business is registered at a different address to where you operate. Trading name inconsistencies are another frequent issue: "J Smith Plumbing Ltd" appearing as "J Smith Plumbing," "J. Smith Plumbing," and "John Smith Plumbing" across different directories.

Why It Matters More Than You Think

The practical consequences of inaccurate listings operate on two levels. The first is direct: a customer finds your listing on Yell, calls the number listed, and gets a disconnected tone or reaches someone else entirely. That customer is gone. They will not try to find your correct number; they will simply call the next business on the list.

The second consequence is less visible but arguably more damaging. Google, and increasingly AI systems like ChatGPT and Google's AI Overview, use the consistency of your business information across the web as a trust signal. When your name, address, and phone number (your NAP data) are consistent across dozens of directories, it signals to these systems that your business is legitimate, established, and reliable. When they are inconsistent, it creates doubt - and doubt suppresses your rankings.

"Google uses NAP consistency as a trust signal. Inconsistent listings don't just confuse customers - they actively suppress your search rankings."

This is particularly important as AI-powered search becomes more prevalent. When someone asks ChatGPT to recommend a plumber in their area, or when Google's AI Overview generates a list of local heating engineers, these systems are drawing on a web of data about your business. The more consistent and complete that data is, the more likely you are to be included in the recommendation.

The Most Common Listing Errors

In our audit data, the most frequent errors were:

  • Old or incorrect phone numbers (present in 71% of businesses with listing issues)
  • Missing or incorrect opening hours (present in 68% of businesses)
  • Inconsistent business name formatting (present in 61% of businesses)
  • Missing or outdated website URL (present in 54% of businesses)
  • Incorrect or missing business category (present in 47% of businesses)

How to Fix Your Listings

The good news is that fixing your directory listings is one of the most straightforward and cost-effective improvements you can make to your online presence. The process has three stages.

Stage 1: Audit what you have. Before you can fix anything, you need to know what is out there. Search for your business name on Google and make a note of every directory where you appear. Pay particular attention to the information shown in each listing. A tool like BrightLocal or Whitespark can automate this process and give you a comprehensive picture of your listing landscape.

Stage 2: Establish your canonical NAP. Decide on the exact, definitive version of your business name, address, and phone number. This is your canonical NAP, and it should be identical everywhere. If your registered name is "Denver Services Ltd," that is what should appear on every listing - not "Denver Services" or "Denver Heating."

Stage 3: Update and claim. Work through each directory systematically, claiming your listing if you have not already done so, and updating the information to match your canonical NAP. Start with the highest-authority directories (Google Business Profile, Bing Places, Apple Maps, Yell, Checkatrade) and work down from there. Some directories will require you to create an account; others will allow you to submit corrections without an account.

Maintaining Accuracy Over Time

Fixing your listings is not a one-time task. Directories regularly pull data from each other, which means errors can reappear even after you have corrected them. A quarterly audit of your key listings - perhaps 30 minutes every three months - is sufficient to catch and correct any drift before it becomes a problem.

If you would rather automate this process, services like BrightLocal, Yext, and Moz Local offer ongoing listing management for a monthly fee. These tools push your canonical NAP data to hundreds of directories simultaneously and monitor for changes. For a busy trades business, the time saving is often worth the cost.