How we score London tattoo shops

London Tattoo Shop Guide currently scores 100 tattoo shop businesses across the city. Every score comes from the same rubric applied the same way to every listing. This page explains what goes into that number, why we weight it the way we do, and where the data falls short.

The five signals, heaviest first

Each business gets a composite score out of 100, built from five measured signals:

• Sentiment, 28%. A synthesis of what recent reviews actually say, weighing praise against recurring complaints.
• Rating, 26%. The Google aggregate star rating.
• Volume, 20%. How many reviews a shop has, log-scaled so that a handful of five-star reviews doesn't outrank a studio with hundreds of consistently good ones.
• Recency, 11%. How recently customers have left reviews, since a studio's staff, hygiene standards and artists can change fast.
• Completeness, 15%. Whether basic information is actually listed: phone number, website, hours and address.

Why sentiment carries the most weight

A star average on its own hides patterns. Two shops can sit at exactly 4.5 stars while one has a string of recent complaints about the same thing, whether that's rushed linework, a piercing done without proper aftercare advice, or a booking deposit that never got refunded. The star number alone won't show you that. Reading what people actually wrote in their reviews is the only way to catch a pattern like that before you book a consultation and put money down. That's why sentiment is weighted above the raw star rating rather than folded into it.

Why the other signals matter

Rating still matters because it's the clearest single snapshot most people check first, and it reflects the aggregate view of everyone who left one. Volume matters because a shop with 400 reviews has a track record that a shop with six doesn't, and log-scaling means an extra 50 reviews at the top end moves the score far less than the jump from 5 reviews to 55 does. Recency matters because tattooing is a trade built on individual artists, and a studio that was excellent three years ago may look completely different today if the team has turned over. Completeness matters in a more practical way: a shop that lists its hours, phone number, website and address is one you can actually contact and plan a consultation with, and that basic transparency is itself a signal worth counting.

Where the data is thin

Some shops on the directory have few reviews, or few recent ones. When that's the case, we label the listing as a low-confidence score rather than pretending the number carries the same weight as a shop with hundreds of recent reviews. Treat those scores as a starting point for your own research, not a final word.

We synthesise review themes rather than republishing individual reviews wholesale, and we link out to Google so you can read the original source yourself and form your own view.

How the score can't be bought

Scores are earned from this rubric and this data alone, and they are never edited by hand to move a business up or down. Where paid placement exists anywhere on the site, it's always labelled clearly as paid, and paying for placement never changes a business's score. Where a list's picks or ordering involved editorial judgment on top of the scores, that's disclosed on the page itself, so you always know whether you're looking at a pure data ranking or one with editorial input. You can see this approach applied on our best tattoo shops in London list.

Who's behind this

London Tattoo Shop Guide is published by Tattoo London HQ. We've been focused on the London tattoo scene since 2008, following the studios, the artists and the standards of work that matter to people getting tattooed. Every listing is built from published review data and public business information, never from paid placement, and we refresh the full directory monthly so the details stay current. Editorial oversight of the rankings sits with Lena Vogel, Senior Editor. If you spot something that looks wrong or out of date, or you run a shop and want to flag an issue, reach the team at hello@tattoolondonhq.com. You can also start from the London Tattoo Shop Guide home page to browse the full directory.