If your insurer has told you that you need a Thatcham-approved tracker before they’ll offer cover, or offer it at a sensible price, you’re not alone in finding the term confusing. At VMS AutoCare, we fit insurance approved trackers across Purley, Croydon and Surrey every week, and the single most common question we’re asked is some version of “what does Thatcham-approved actually mean, and does my car need one?” This guide answers that in plain, backed by Thatcham Research’s own standards, TASSA’s installer guidance, and real UK insurance dispute evidence, so you know exactly what you’re buying before you buy it.
What Does “Thatcham-Approved” Actually Mean?
Thatcham Research is the UK body that tests and rates vehicle security equipment, including GPS trackers and immobilisers, against independent performance standards. When a device is described as a Thatcham-approved tracker, it means the device itself, not just the company selling it, has passed Thatcham’s own testing for reliability, tamper resistance and recovery performance.
Thatcham assigns each approved tracker a Thatcham category: commonly S5, S7, or a “+”/“-ALS” variant with extra features. The Thatcham category tells your insurer exactly what level of protection the device provides, which is why many policies name a specific category rather than just saying “a tracker.” A properly fitted and monitored Thatcham-approved tracker is one of the few vehicle security measures most UK insurers recognise by name in their own policy wording.
- Independent testing: the tracker, not just the brand, is assessed against Thatcham’s own standard.
- A stated Thatcham category that insurers can check directly against their own policy requirements.
- Ongoing monitoring: a genuine insurance approved tracker is paired with a 24/7 monitoring centre, not just a location pin in an app.
- A documented fitting record, so there is proof of exactly what Thatcham category was installed and when.
Thatcham Tracker Categories at a Glance
| Thatcham category | Product | Headline feature | Best suited to |
| S7 | Scorpion S7 | 24/7 monitoring, tow-away and tamper alerts | Drivers who need Thatcham approval without keyless-specific risk |
| S5 | Scorpion S5 | Adds the ADR driver recognition tag to counter relay theft and key cloning | Keyless-entry vehicles and known theft-target models |
| S5 Plus | Scorpion S5+ | Built-in automatic and remote immobilisation on top of the S5 | High-value, performance or frequently targeted vehicles |
Thatcham vs TASSA: Which Body Covers What
It’s easy to confuse Thatcham with TASSA, because both names turn up in the same conversation about vehicle security, and the TASSA vs Thatcham question is one of the most common we’re asked. The simplest way to remember the difference is set out below.
| Thatcham Research | TASSA | |
| What it rates | The security device itself (the tracker or immobiliser) | The installer and the fitting standard |
| Gives you | A Thatcham category (S5, S7, S5+ and similar) | Confirmation your fitter is a genuine TASSA approved installer |
| Why it matters to your insurer | Confirms the product meets a recognised performance standard | Confirms the device was fitted correctly, not just sold |
In practice, a genuine Thatcham-approved tracker fitted by a properly trained installer should satisfy both halves of that picture. If a seller can only point to one half (a product claim with no mention of installer standards, or vice versa), it’s worth asking a direct question before you buy.
How to Check Car Security Installer Legitimacy
Knowing how to check car security installer legitimacy properly takes a few minutes and can save a disputed claim later. Before booking, ask or check for:
- Confirmation the fitter is a TASSA approved installer, not just that the product itself carries a Thatcham badge.
- The exact Thatcham category of the device being fitted, in writing, before the appointment.
- A dated fitting certificate or paperwork you can hand to your insurer, not a verbal assurance.
- A monitoring centre you can actually contact, with a published 24/7 number, rather than an app with no human support behind it.
Does a Thatcham Approved Tracker Lower Your Premium?
Not automatically. Some insurers require a named category for theft cover; some offer a discount, and some do neither. Confirm both before you buy and read our guide on whether a car tracker lowers your insurance. Once fitted, tell your insurer in writing.
Does Your Insurer Actually Require a Thatcham-Approved Tracker?
Not every UK driver needs one. Whether your insurer requires a Thatcham-approved tracker, or simply rewards fitting one with a lower premium, depends on your vehicle, your claims history and your specific policy. Higher-value vehicles, cars that appear on current theft-target lists, and drivers with a previous theft claim are the groups most likely to see a Thatcham category named explicitly as a policy condition rather than an optional extra.
The honest answer to “does fitting a tracker guarantee a lower premium” is no, not on its own. Some insurers offer a meaningful discount, some treat a Thatcham-approved tracker purely as a condition of cover with no separate saving, and a few don’t factor it in at all. Always confirm directly with your insurer which Thatcham category they ask for before you buy, rather than assuming any vehicle tracker UK retailers sell will automatically satisfy your policy.
When Factory Telematics Isn’t Enough
A question we hear often from owners of newer, connected vehicles: “My car already has built-in tracking through the manufacturer’s app, doesn’t that count?” Usually, no. Manufacturer telematics is built for convenience features like remote locking and journey history, not for Thatcham’s independent security testing, and it almost never carries a Thatcham category or round-the-clock monitoring centre. If your insurer has specifically asked for a Thatcham-approved tracker, a factory connected-car system is very unlikely to satisfy that requirement on its own.
What Happens If an Insurer Declines a Tracker Claim?
The Financial Ombudsman Service publishes its final decisions. Two show how these disputes start. In DRN-5704833, issued in 2025, the car had a tracker but its subscription had not been activated when it was stolen. The policy required a Thatcham approved tracker with a continually active subscription, and the insurer declined the claim. The complaint was not upheld.
In DRN-3462814, decided in 2022, the policyholder believed the factory-fitted tracker was enough. The policy required an approved device in operation with its subscription maintained. That complaint was not upheld either.
The common thread is the policy of wording and an active subscription, not the badge on the box. Keep your fitting documents, activate the subscription at fitting and diarise renewals.
Which VMS AutoCare Tracker is Thatcham-Approved?
Every tracker for VMS AutoCare supplies and fits carries genuine Thatcham approval. Our ScorpionTrack range covers three Thatcham categories so you can match the device to what your insurer actually asks for, rather than guessing:
- Scorpion S7 Tracker: Thatcham Category S7, 24/7 monitoring, tow-away and tamper alerts.
- Scorpion S5 Tracker: Thatcham Category S5, adds the ADR driver recognition tag to counter relay theft and key cloning.
- Scorpion S5+ Tracker: Thatcham Category S5 with built-in automatic and remote immobilisation on top of everything the S5 offers.
Browse the full range of insurance approved trackers, if you’re still deciding between them, our full comparison, Scorpion S5 vs S5+ vs S7, which one do you need?, breaks down the practical differences in detail.
Pairing a Tracker With a Thatcham Approved Immobiliser
A Thatcham-approved tracker is strongest when it isn’t working alone. A tracker helps recover a stolen vehicle after the fact; a Thatcham approved immobiliser is designed to stop the car being driven away in the first place. Many of the same insurers who ask for a specific Thatcham category on a tracker will also recognise a Thatcham approved immobiliser as a separate, additional factor in how they price your cover, particularly on vehicles that are frequent relay-theft targets.
VMS AutoCare fits both sides of this pairing: a Thatcham-approved tracker from the ScorpionTrack range for recovery, and a CAN-bus or Scorpion X-Series Thatcham approved immobiliser for prevention. If you’re only budgeting for one device this year, ask us which combination your specific insurer actually rewards before you decide, since the answer genuinely varies policy to policy.
Recovery, Monitoring and Subscriptions
A Thatcham-approved tracker only works as a stolen vehicle recovery tracker if someone is actually watching it. Every ScorpionTrack device VMS AutoCare fits is connected to a 24/7 UK monitoring centre: if the vehicle moves without the registered ADR driver recognition tag present, the centre is alerted immediately and can liaise directly with the police using a crime reference number, rather than leaving you to notice the car is missing on your own. That live monitoring link is what actually makes it a stolen vehicle recovery tracker, not just a location app.
Do vehicle trackers require a subscription?
Yes. A vehicle tracker needs an active subscription to provide ongoing monitoring, live GPS tracking and the multi-network SIM connection that keeps the device communicating across the UK. Subscriptions are generally renewed annually, although some tracker models may offer a lifetime subscription option.
If the subscription expires, the tracker hardware remains installed in the vehicle, but the monitoring and recovery service is no longer active. It is therefore important to keep your subscription up to date, just as you would keep track of your MOT and insurance renewal dates.
Where Can You Get a Thatcham Approved Tracker Fitted in Purley and Croydon?
Choosing the right Thatcham category shouldn’t be guesswork, and it shouldn’t be left until after a claim is disputed. VMS AutoCare fits every tracker in our range to the Thatcham-approved standard, with the paperwork to prove it, across Purley, Croydon and the wider Surrey area. Before you book, confirm the category your insurer names. Send us the policy wording and we will confirm which Thatcham approved tracker it points to. Request a quote online or call 07853 882184.
A quick five-minute call with your insurer, before you buy anything, saves far more hassle than discovering after a theft that the Thatcham category you fitted wasn’t quite the one your policy named. It’s the single most useful step in this whole process, and it costs nothing.
FAQs
Q: What does Thatcham approved mean for a tracker?
A: The device has been assessed by Thatcham Research to a category, S5 or S7, and works with a monitoring service.
Q: TASSA vs Thatcham: what is the difference?
A: Thatcham sets the tracker category. TASSA verifies aftermarket products and installers and records fits on a database.
Q: Does fitting a tracker guarantee a lower premium?
A: No. Some insurers discount it, some only require it, and some do neither, so confirm first.
Q: Is there a car tracker with no subscription?
A: Not among the ScorpionTrack trackers, VMS Autocare fits. Monitoring runs on a ScorpionTrack subscription, which many policies require to be active at the time of a claim.
Q: What happens if my insurer disputes my tracker claim?
A: Send your fitting documents and subscription records, and ask for the decision in writing. If unresolved, refer the complaint to the Financial Ombudsman Service.
Q: Does VMS Autocare fit Thatcham-approved trackers in Purley and Croydon?
A: Yes. VMS Autocare is based in Purley and fits ScorpionTrack S7, S5 and S5+ trackers across Croydon and Surrey.