Speed cameras are a familiar sight for UK drivers and if you’re a PCO driver in London, you’ve likely spotted mobile camera vans parked on roadside lay-bys or bridges. But here’s the real question: how much tolerance do mobile speed cameras allow in the UK?
Understanding how mobile speed cameras work and what their tolerance thresholds are can ensure that you are avoiding points on your licence, and will result in less stress when driving around London.
In this guide, we’ll break down everything you need to know about mobile speed camera tolerance in the UK, including how they differ from fixed cameras, what penalties you might face, and tips on how to stay compliant to the UK road laws.
What Is a Mobile Speed Camera?
Mobile speed cameras are temporary, vehicle-based enforcement tools used by police forces and local authorities to monitor driver speeds in real-time.
Unlike fixed cameras, these can appear almost anywhere from motorway bridges to residential areas.
They are often housed in:
- Police vans with camera equipment
- Tripod-mounted cameras on the roadside
- Unmarked vehicles used for covert monitoring
How Mobile Speed Cameras Work
When a vehicle exceeds the speed limit, the system records:
- The vehicle’s speed
- The date, time, and location
- A video or photo showing the vehicle and its registration number
This evidence is then reviewed by enforcement officers, and if a violation is confirmed, a Notice of Intended Prosecution (NIP) is sent to the registered keeper.
Mobile Speed Camera Tolerance in the UK
So, what’s the tolerance level before you’re likely to be penalised?
Whilst this isn’t an absolute rule, guidance from the National Police Chiefs’ Council (NPCC) recommends a 10% + 2 mph rule.
Example of Mobile Speed Camera Tolerance
| Speed Limit | Recommended Tolerance | Likely Enforcement Speed |
| 30 mph | 10% + 2 mph | 35 mph |
| 40 mph | 10% + 2 mph | 46 mph |
| 50 mph | 10% + 2 mph | 57 mph |
| 60 mph | 10% + 2 mph | 68 mph |
| 70 mph | 10% + 2 mph | 79 mph |
It’s important to remember that this is only guidance — local police forces can (and sometimes do) enforce limits at any speed above the posted limit.
Mobile Speed Cameras vs Fixed and Average Speed Cameras
Many drivers assume all cameras work the same way but that’s not true. Each system has its own enforcement style.
Mobile Speed Cameras
- Operated manually by trained officers
- Can change location frequently
- Use laser or radar for instant readings
Fixed Speed Cameras
- Permanently installed on high-risk roads
- Trigger automatically when speed exceeds set threshold
- Generally, use the same tolerance (10% + 2 mph)
For more information on fixed speed cameras, you can visit the Metropolitan Police website.
Average Speed Cameras
- Measure your average speed between two or more points
- Your entire journey is tracked between journeys. Each individual camera will not give you a tolerance
- If your average speed has been higher than the speed limit, slowing down just before the cameras will not help
- Reducing speed just before passing one camera won’t help
Penalties for Exceeding the Speed Limit in the UK
If caught by a mobile speed camera, penalties depend on how far over the limit you were driving.
Possible Consequences Include:
- Fixed Penalty Notice (FPN) — typically £100 fine and 3 penalty points
- Speed Awareness Course — available for minor offences (if eligible)
- Court Summons — for serious or repeat offences, leading to higher fines or disqualification
To learn more, check GOV.UK’s page on Speeding Fines and Penalties.
You can also find more information on the guidelines for speeding here.
How Tolerance Impacts Appeals and Challenges
Many drivers wonder if tolerance levels can be used to challenge speeding tickets. In most cases, no, the tolerance is not a legal right, it’s operational discretion.
However, you may have grounds to appeal if:
- The speed camera wasn’t properly set up
- You weren’t the driver at the time
- The signage was missing or unclear
For professional drivers, especially those with PCO licences, protecting your driving record is vital.
Too many points can risk your TfL Private Hire Licence.
Always check official TfL guidance on private hire driver responsibilities.
Tips to Avoid Mobile Speed Camera Penalties
As a professional driver, avoiding speeding fines protects both your income and your reputation.
Here are practical tips to stay safe and compliant:
- Know the Speed Limits
Different vehicles have different speed limits. For example, vans and minibuses often have lower limits on some roads.
Check GOV.UK – Speed Limits for official details.
- Watch for Warning Signs
Many camera zones display speed camera warning signs, but not all.
Always assume a camera could be present and do not speed at any point.
- Use Technology
Apps like Google Maps, Waze, and dedicated dashcams can alert you to known camera zones.
Reminder: Staying within limits is the best defence.
- Stay Calm and Consistent
Sudden braking can look suspicious and even be dangerous. Maintain a steady, legal speed throughout your journey.
- Learn from Past Mistakes
If you’ve been fined before, treat it as a learning experience. Make note of the area and adjust your driving habits accordingly.
Mobile Speed Cameras in London: Hotspots to Watch
In London, mobile cameras often appear in high-traffic or accident-prone areas.
To stay ahead, regularly check updates from Transport for London (TfL) and your local police force.
Frequently Asked Questions About Mobile Speed Camera Tolerance
Q: Can a mobile camera catch me from behind?
A: Yes. Many modern mobile cameras can detect speed from both front and rear views.
Q: Do mobile cameras flash?
A: Not always. Some operate with infrared and can work day or night without visible flash.
Q: How far away can a mobile camera catch you?
A: Depending on the equipment, mobile cameras can detect vehicles up to 1 kilometre away.
Q: Are mobile cameras always accurate?
A: They are tested and calibrated regularly, but like any device, errors can occur — always check your ticket carefully.
Related Reading from Rapid PCO
Final Thoughts: Stay Informed, Stay Safe
Understanding mobile speed camera tolerance in the UK helps you stay compliant, confident, and in control behind the wheel.
As a London PCO driver, driving safely isn’t just about avoiding fines, it’s about protecting your licence, your passengers, and your livelihood.
At Rapid PCO, we’re here to support professional drivers across London with reliable, affordable PCO car hire options. Whether you’re driving for Uber, Bolt, or Free Now, you can rent with confidence from Rapid.
