The EV Pros

Last updated: 30 April 2026

Trust Score methodology

The Trust Score is a number from 0 to 100 we publish on every garage profile. It exists to help drivers spot the most trustworthy EV and hybrid specialists at a glance, without having to chase reviews and accreditations across a dozen websites.

How the score is built

We combine thirteen separate signals, each scored from 0 to 1, weight them, and add them up. The maximum is 100. Every signal sits in one of five buckets.

Why we weight things this way

Google reviews

Real customer reviews matter most, so they carry the largest single chunk of the score. We use a Bayesian average. That means a garage with five 5-star reviews does not automatically beat one with two hundred reviews averaging 4.7. A small sample is pulled gently towards the directory-wide average until the volume justifies a stronger position.

Volume is scored on a logarithmic curve. Going from 10 to 100 reviews matters more than going from 1,000 to 1,090. Recency uses an exponential decay over twelve months, so an active garage taking new reviews stays ahead of a once-busy one that has gone quiet.

Trustpilot

The same Bayesian and logarithmic logic applies. The weighting is lower because not every garage has a Trustpilot presence and we will not punish garages for not paying for one. Listings without a profile receive a neutral score for these signals rather than a zero.

Accreditations

HEVRA membership is significant because it is EV specific. IMI certification covers individual technician credentials, again a strong signal for EV competence. Beyond those two, a garage gets credit for additional recognised schemes (Motor Ombudsman, Which? Trusted Trader, Buy With Confidence, Good Garage Scheme, OZEV approved installer, BS 10125, manufacturer-approved status, NICEIC, NAPIT, IAAF, IGA, ISO 9001). Up to four count toward the score, so stacking certificates beyond a sensible level does not help.

Track record

Companies House gives us official incorporation dates. Years trading is scored on a logarithmic curve that rewards longevity but does not let a fifty-year-old garage coast on age alone. A garage being claimed by its actual owner, rather than sitting unclaimed in the directory, is a strong trust signal in itself.

Engagement and quality

A garage that fills in its full profile, replies to its reviews, has a working website, and shows as active at Companies House is one that is paying attention. That last bit is small in points but meaningful in spirit.

Where the data comes from

How often it is recalculated

Source data is refreshed on its own schedule. Google reviews and Trustpilot are pulled daily, HEVRA and Companies House monthly. The full Trust Score is then recomputed every night at 03:00 UK time, so any changes show up the next day. The displayed score is always the cached overnight value, never live, which keeps every page fast.

What it does not measure

The Trust Score does not measure price, location convenience, opening hours, or whether a garage works on your specific car. It is a measure of how trustworthy a garage is, in aggregate, based on signals that are publicly verifiable. It is one input to your decision, not the whole decision.

Score bands

If you run a garage

The fastest way to lift your score is to claim your listing, fill in every field, link your Google business profile, and reply to your customer reviews. Add HEVRA or IMI evidence and we will verify it through the dashboard. We do not sell rank: paid placements are labelled separately and the Trust Score is unaffected by them.

We update this page whenever the calculation changes. If a weight or formula moves, the new value is reflected on the same day for every listing.

See the full leaderboard.