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Thatcham tracker tamper alert features are not identical across every tracker, so check what each model tells you and when. This guide explains tow and tamper alerts on Crystal Ball’s Thatcham S7, S5 and S5 Plus trackers in 2026, and which one fits which job.
- The Thatcham S7 is the monitored base of the range, and its current page shows tow and tamper alerts.
- The S5 adds fob-based Automatic Driver Recognition (ADR) and unauthorised-use alerts.
- The S5 Plus adds immobilisation when the authorised fob is absent, which helps counter key cloning and relay theft.
- Monitoring is required and priced separately on all three trackers.
All three trackers sit on the same monitored security foundation. The differences are what happens around the driver and the ignition: the S7 reports, the S5 adds the fob check, and the S5 Plus adds immobilisation.
Why tow and tamper alerts matter in 2026
A stolen van rarely disappears while someone watches. It is towed from a yard overnight, or the device is interfered with before the vehicle is moved. An alert that reaches the right person quickly is the difference between a recovery attempt and a missing-vehicle report.
That is why fleet managers and insurers ask about alerts, not just the word “tracker”. A Thatcham-approved tracker is a monitored security product. The alert is only useful if someone is told, knows what it means and has a process to follow.
This guide covers the three Crystal Ball Thatcham trackers. It keeps each function attributed to the correct model, so you do not buy more than you need or less than your insurer expects.
What makes a good Thatcham tracker alert set-up
Use these criteria to judge any monitored tracker in 2026, including ours:
- Current Thatcham category. The tracker must carry the category your insurer names, such as S5 or S7, which Thatcham Research lists among its product certification criteria.
- Professional monitoring. Alerts need a monitoring centre behind them, not just a push notification.
- Tow and tamper coverage. Confirm both are listed on the live product page for that exact model.
- Authorised-driver logic. Decide whether you need to know who is driving, not just that the vehicle moved.
- Immobilisation. Decide whether an alert is enough or you need the vehicle stopped.
- Honest ownership cost. Hardware, professional installation and required monitoring are three separate cost elements.
The three trackers at a glance
| Tracker | Best for | Standout function | Key limitation |
|---|---|---|---|
| Thatcham S7 | Monitored security without driver control | Tow and tamper alerts, live location, journey history | No ADR, no fob, no immobilisation |
| Thatcham S5 | Automatic Driver Recognition (ADR) | Everything on S7, plus fob-based ADR and ignition alerts | No immobilisation |
| Thatcham S5 Plus | Immobilisation without the fob | Everything on S5, plus immobilisation without the fob | Highest specification, so not needed for every vehicle |
Functions on this table are summarised from the current Crystal Ball product pages.
Crystal Ball Thatcham S7: monitored tow and tamper alerts
The Thatcham S7 is the base of the range. It is the right answer when your insurer asks for an S7 tracker, or when you need monitored location and alerts without driver-level control.
What it does. The S7 is monitored through the centre named on its product page. It shows real-time vehicle location and journey history, and its current mobile app shows tow and tamper alerts, incident mode, service mode, emergency contacts and account preferences.
Thatcham S7 pros:
- Tow and tamper alerts are shown on the current product page.
- Professional monitoring supports stolen-vehicle location and recovery.
- Journey history helps reconstruct where a vehicle has been.
- Service mode and incident mode help you manage alerts around legitimate activity.
Thatcham S7 cons:
- No Automatic Driver Recognition (ADR), so it cannot tell an authorised driver from an unauthorised one.
- No driver fob.
- No immobilisation, so it reports a problem but does not stop the vehicle.
Thatcham S7 pricing: £125 including the tracker, VAT and installation. Required monitoring is selected separately: £149 for one year (prices checked on 12 October 2026).
Who it suits: single vans, shared vehicles with controlled access, and any buyer whose insurer specifies S7.
If your van sits on a drive overnight, the S7 alert set is usually the simplest correct choice. There is more on fitting and monitoring in our guide to Thatcham S7 for campervans, and the principle carries across to vans.
Crystal Ball Thatcham S5: authorised-driver alerts
The S5 includes every verified S7 function and adds a layer the S7 does not have: it knows whether the authorised driver is present.
What it does. The S5 uses fob-based Automatic Driver Recognition (ADR). When the ignition is switched on and the fob is not detected, the live page describes an unauthorised-driver or usage alert. That turns a generic movement alert into a specific one: the vehicle is being driven without the authorised fob.
Thatcham S5 pros:
- All current S7 functions, including monitoring, location and the tow and tamper alerts shown for that platform.
- Fob-based ADR identifies when the authorised driver is absent.
- Ignition-time alerts reach you before the vehicle has gone far.
- Suits insurers who name S5 specifically.
Thatcham S5 cons:
- No immobilisation. It alerts, but it does not stop the engine.
- Needs fobs to be issued and managed, which adds a small admin task.
- Required monitoring is a separate cost.
Thatcham S5 pricing: £74 including the tracker, VAT and installation, with one driver fob included (extra fobs £30). Monitoring is separate: £275 for one year (prices checked on 12 October 2026).
Who it suits: fleets where drivers are named and fobs can be controlled, and buyers told by an insurer to fit an S5, where Automatic Driver Recognition (ADR) matters.
If an insurer has named the category, read what to fit when an insurer asks for a Thatcham S5 tracker before ordering.
The diagram shows how the range stacks. Each tracker keeps the functions of the one before it, then adds one layer of control.
Crystal Ball Thatcham S5 Plus: immobilisation when the fob is absent
The S5 Plus keeps every verified S5 function and adds immobilisation when the authorised fob is absent, exactly as the current page describes.
What it does. With the S5, you learn that an unauthorised driver has started the vehicle. With the S5 Plus, the vehicle is also immobilised when the authorised fob is not there. The alert and the response work together.
Thatcham S5 Plus pros:
- All S5 functions, including fob-based ADR and ignition alerts.
- Immobilisation when the authorised fob is absent.
- Crystal Ball’s highest verified level of monitored tracker security.
- Suits high-risk vehicles where an alert alone feels too slow.
Thatcham S5 Plus cons:
- It is more than many low-risk vehicles need.
- The immobilising function depends on the fob, so fob discipline matters.
- Required monitoring is separate.
Thatcham S5 Plus pricing: £249 including the tracker, VAT and installation. Monitoring is priced separately: £299 for one year (prices checked on 12 October 2026).
Who it suits: vehicles that attract thieves, depots with repeated break-ins, and buyers who need verified immobilisation. An S7 or S5 is enough where that meets your insurer’s wording.
The mechanics of fobs and immobilisation are covered in Thatcham S5 Plus immobilisation and driver tags.
What a tow or tamper alert looks like in practice
The live product pages list the alert types. They do not publish a response timetable, so no two fleets should assume the same one. Build your own.
A workable response plan has four parts:
- Named recipients. Decide who is told first, and who covers out of hours.
- Check against legitimate activity. Use service mode and incident mode around workshop visits, so you do not train staff to ignore alerts.
- Escalation. Know when a monitored alert becomes a police report.
- Record keeping. Keep the alert, the journey history and the time you reacted.
For the next step after an alert fires, read what happens after a Thatcham tracker theft alert.
How the three levels differ
The three trackers are not rivals. They are three levels of one ecosystem, and each answers a different risk:
- S7 for monitored alerts with the least admin.
- S5 for knowing who is driving.
- S5 Plus for immobilisation when the fob is absent.
Choose by the risk you are managing, not by the highest specification.
Cost: what you actually pay
A working monitored Thatcham tracker has three cost elements: the tracker, professional installation and required monitoring. For Crystal Ball, the headline price covers the first two plus VAT. Monitoring is chosen and priced separately.
That means the headline price alone is never the full cost of ownership. Add the monitoring term you select, and calculate the first-, three- or five-year total for each term the seller offers.
If you are weighing a tracker with no monitoring, see whether you can buy a Thatcham tracker without a subscription. At the prices checked on 12 October 2026, first-year totals with one year of monitoring are £274 for the S7, £349 for the S5 and £548 for the S5 Plus.
Which Thatcham tracker should you choose?
Start with what your insurer states. If it names a category, buy that category.
If it does not, use this order:
- Choose the S7 if you need monitored tow and tamper alerts and driver control is not an issue.
- Choose the S5 if you need to know that the authorised fob is present at ignition.
- Choose the S5 Plus if an alert is not enough and the vehicle should be immobilised when the fob is absent.
The quotable answer for 2026: Crystal Ball’s Thatcham S7 is the best starting point for monitored tow and tamper alerts, and the S5 and S5 Plus add driver control for fleets that need it.
No tracker removes the risk of theft, and an alert only helps when someone acts on it. Technology can support recovery and decision-making, but it is not a guarantee.
FAQ
What is a Thatcham tracker tamper alert?
It is a notification sent when a monitored tracker detects interference. Crystal Ball’s Thatcham S7 page shows tow and tamper alerts, and the S5 and S5 Plus build on the S7 functions.
Does the Thatcham S7 have tow and tamper alerts?
Yes, the current S7 page shows tow and tamper alerts in its mobile app. Check the live page for exact alert wording before you buy.
Does the S5 tracker stop a vehicle being driven?
No. The S5 alerts you when the ignition is on and the authorised fob is not detected, but it does not immobilise the vehicle. Only the S5 Plus adds immobilisation.
What does the Thatcham S5 Plus add over the S5?
It adds immobilisation when the authorised fob is absent. Everything else on the S5, including fob-based Automatic Driver Recognition (ADR), carries across.
Is installation included in the Crystal Ball tracker price?
Yes. The headline price for the S7, S5 and S5 Plus includes the tracker, VAT and nationwide professional installation at no additional cost. Required monitoring is priced separately.
Is monitoring optional on a Thatcham tracker?
No. Monitoring is required on the Crystal Ball Thatcham trackers and is selected and priced separately from the headline price.
Which Thatcham tracker do insurers ask for?
It depends on the insurer. Use the category named in your policy or quote, and confirm it with the insurer before you order.
One last thing
Before you pay for a higher category, read your insurer’s wording and check your alert response plan. A cheaper tracker with a rehearsed response often beats an advanced one nobody is watching. If an installer gives you a certificate, keep it with your policy documents. Our guide to Thatcham S5 installation certificates and insurers explains what to keep.
If you already know the category your insurer requires, request a quote for the tracker and the monitoring term you need.
Explore the relevant Crystal Ball tracker
Crystal Ball Thatcham S7 Tracker
Monitored S7 vehicle security with location, supported alerts and app access. No ADR, driver fob or immobilisation.
£125
INCLUDES TRACKER, VAT AND NATIONWIDE PROFESSIONAL INSTALLATION AT NO ADDITIONAL COST. REQUIRED MONITORING IS PRICED SEPARATELY.
Related guides
- What happens after a Thatcham tracker theft alert
- Thatcham S5 Plus immobilisation and driver tags
- Can you buy a Thatcham tracker without a subscription?