Most drivers think of a 20mph limit as a gentle suggestion. A case heard at a south east London magistrates’ court this month shows just how wrong that assumption can be. A 59-year-old woman was caught driving at 28mph on Bayswater Road in Westminster, only 8mph over the limit, and walked out with a driving ban rather than a few points and a fine. With more than half of the roads in some cities now set at 20mph, and cameras catching record numbers of drivers, the gap between a minor slip and the loss of your licence has never been smaller.

Because the driver already had previous offences on her record, the new enforcement tipped her into a disqualification. She was banned from driving for three months, fined £40, ordered to pay a £32 victim surcharge and £60 in costs.

The enforcement figures are striking. A single camera on the King’s Road in Chelsea caught 851 drivers in one day, believed to be a British record. A camera on the A40 in north west London issued around 50,000 fines in 2024 alone. In Westminster, recorded speeding offences climbed 30 per cent in two years, from about 29,000 to 37,800, while neighbouring Kensington and Chelsea saw fines rise by more than 600 per cent year on year. Across London as a whole, 778,600 speeding tickets were issued in a single year.

Many of these cameras are bi-directional and increasingly use automated detection, so they capture far more vehicles than the older single lane units. The result is that a brief lapse on a quiet residential road, the kind of thing that once went unnoticed, is now routinely recorded and processed. If you have grown used to driving at 25 to 30mph on streets that were 30mph until recently, you are exactly the driver these cameras are catching.

The real danger is the totting up system. Collect 12 or more penalty points within three years and you face an automatic disqualification, usually for six months. The three year window runs from the date of each offence, not the date of conviction, so points from an incident almost three years ago still count towards a ban today.

This is how an 8mph overshoot turns into a disqualification. The points themselves were ordinary. It was the driver’s existing record that made the difference. Anyone already carrying six or nine points should treat every 20mph zone as a place where a single careless moment could cost them the right to drive. There is a defence of exceptional hardship, which allows a court to reduce or avoid a ban where the consequences go beyond the inconvenience any driver would face, such as losing a job that requires driving or being unable to care for a dependent relative. It is a formal legal argument, it is not guaranteed, and it cannot be relied on as a safety net.

A speed awareness course is usually offered for lower level offences if you have not attended one in the previous three years, and it keeps the points off your licence. For anyone already close to 12 points that option is worth far more than the course fee. Police forces commonly apply a guideline threshold of 10 per cent plus 2mph before acting, which on a 20mph road means action can begin from 24mph, but this is guidance rather than law and individual forces set their own approach. The safest assumption is that the limit is the limit. [It certainly is. Locally stories abound of drivers being convicted for 22 mph.]

The practical takeaway is simple. Check your speedometer often on residential roads, [which can be a distraction in itself] because 20mph feels unnaturally slow and it is easy to drift up to 25 or 26 without realising. Know how many points you already carry, and if you are close to the totting up threshold, consider that a course or a careful month of driving is a small price next to a six month ban.

Until recently the 20mph limit was a rarity, reserved for the immediate area around a school or a busy town centre. That has changed dramatically. Councils across the country have rolled out blanket 20mph zones covering entire residential districts, and in Wales 20mph became the default limit for most built up roads in 2023. The argument behind the shift is safety: a pedestrian struck at 20mph is far more likely to survive than one hit at 30mph, and the lower speed gives drivers more time to react to children, cyclists and people stepping out between parked cars.

For drivers, the practical effect is that roads which were 30mph for decades now carry a lower limit, often marked only by small repeater signs and a change in the road markings. Muscle memory built up over years of driving the same route does not reset overnight, and that is precisely where people come unstuck. The driver who has always done 28mph down a familiar road is now 8mph over a limit that may have changed only recently, and the cameras do not care that the habit predates the new sign.

Extracts from an MSN article quoting the Motoring Chronicle 9 June 2026

Observations

Safety is the argument given by those who have pushed for the 20 mph limit. In fact the argument is contentious. What do we know about the effect of say a 22 mph limit? The 20 mph limit is imposed in areas where there are no pedestrians, cycling lanes and no parked cars. In some areas 20 mph is unnaturally slow and you will undoubtedly be overtaken (perhaps dangerously) by drivers who know there is no speed camera in that area. Mortlake Road in Kew and Roehampton Lane are good examples.

In fact as the figures show, it is a money making machine. And perhaps even more important to those who want us all to get on our bikes, it increasingly reduces the number of drivers on the road.

Cyclists and pedestrians must take some responsibility for their own actions. Should there be concerns that they will take more risks when cars are driving slower?

In some areas 20 mph is unnaturally slow and you will undoubtedly be overtaken (perhaps dangerously) by drivers who know there is no speed camera in that area.

On other roads (say Priory Lane, London SW14, where road signs warn of a camera, but there is no sign of a camera) you will often lose nothing by driving very slowly. Just in case!

The bottom line? Put your speed limiter on.

The 2025 figures are bound to increase. When lives are being ruined by minor infractions just how many drivers will it take to be criminalised for a more discriminating policy to be considered?