Your driver can be sober, safe and legal to work on Monday, and still be convicted for Saturday night. We make sure no driver can say “I didn’t know”.
A half-day course on your site, anywhere in the UK, and a 15-minute pack your own managers run on every shift.
Every figure below comes from DVLA records. Nothing on this site is estimated.
0
Drug driving endorsements added to UK licences in 2025
1every 17 min
The 2025 rate, round the clock, all year
0
Drivers holding at least one DG10 endorsement
0years
How long it stays on a licence
2025 was the first year drug driving endorsements overtook drink driving (30,707 against 29,769). Source: DVLA data analysed by IAM RoadSmart, 9 July 2026; RAC analysis of DVLA data, Freedom of Information request FOIR12833, published 19 May 2026. The rate is arithmetic on the 2025 figure.
This is the part almost nobody has been told, and it is the reason people are convicted while stone-cold sober.
Since March 2015, Section 5A of the Road Traffic Act makes it an offence to drive with any of 17 specified drugs above a set limit in your blood.
It is a limit offence, not an impairment offence. The law does not ask whether you were a danger. It asks what was in the blood sample. Feeling completely fine is not a defence, and neither is driving perfectly.
For illegal drugs the limits are set close to zero on purpose. This is a zero-tolerance law, and Parliament wrote it that way deliberately.
One of the 17 listed substances is benzoylecgonine (BZE): not cocaine itself, but what your body turns cocaine into. It stays in the blood long after any effect has gone. That is how you can be convicted stone-cold sober. The conviction is still recorded, and reported, as drug driving.
Almost nobody has heard of it. That includes most of the people convicted because of it.
The Sentencing Council’s guideline for this offence states plainly that it is not possible to draw a direct connection between the levels of a substance detected and the level of harm
, and that limits for illegal drugs are set in line with a zero tolerance approach but ruling out accidental exposure
.
Sentencing Council, Driving or attempting to drive with a specified drug above the specified limit, effective 1 July 2023.
The single most practically useful thing in the talk. It is what a driver needs in the worst ten minutes of his year.
Most people assume the roadside swab is the thing that convicts them. It isn’t, and knowing the difference is the most practically useful thing a driver can carry. It is also the difference between a very bad afternoon and losing the licence in that photograph.
It flags, and it convicts nobody. It is not the evidence of the offence. What it does is give an officer grounds to arrest.
A blood sample is taken by a healthcare professional and sent to a laboratory. Only the blood decides. Everything that follows, charge or no charge, comes from that result.
A swab can flag and the blood come back clean. It happened to the founder of this site: pulled over for a broken wing mirror, swab flagged, blood completely clear, no charge. The safeguard is real.
If you are ever tested: comply calmly, say little, and remember the blood sample is the evidence that matters. Refusing to provide a specimen is a separate offence in its own right, with obligatory disqualification of at least 12 months.
“So how long do I have to wait?”It comes up in every single session, usually within the first five minutes of the questions. The answer is the same every time, and it is not a number.
You can feel this one. It stops, and you know it has stopped.
Keeps running after clock 1 stops. No end is marked, because nobody can honestly mark one.
Almost everyone decides “am I okay to drive?” using Clock 1. The law only ever reads Clock 2.
Nobody, including the police, including this site, including anyone who offers you a number, can tell you exactly when Clock 2 stops for your body.
That’s not a gap in this website. That’s the actual scientific position, and anyone who gives you a number is guessing with your licence.
The limit isn’t set at “too impaired to drive”. It’s set barely above zero. You are not waiting to be safe, you are waiting to be undetectable, and nobody can tell you when that is.
If you drive for a living: the two things don’t go together at all. You’re not gambling a fine. You’re gambling your wage.
People search for a BZE drug test calculator, a benzoylecgonine driving limit calculator, a drug driving calculator. Here is why one doesn’t exist, and why we will never build one.
A calculator would have to predict what an evidential blood sample will contain at a future moment, for one specific body. Not an average body. Yours. That prediction cannot be made reliably, and a calculator that pretends otherwise is not a tool. It is a confident-looking guess with your licence attached to it.
And notice what such a tool would be for. Not deciding whether you are safe, because the limit is not set at the point of danger. It would be for estimating when you would stop being detectable. Building it would make us the exact problem we exist to warn people about.
Open the first four results for your search and compare them. You will find different figures, different ranges, and different confidence levels, often on pages selling something.
They cannot all be right. There is no way for you to tell which one is, if any. And the one you are most likely to believe is the one that gives you the answer you want.
That contradiction is the finding. It is not that the internet hasn’t got round to answering this properly. It is that the question does not have the kind of answer people want it to have.
You stop trying to time it, because timing it is the thing that cannot be done. The rule that works is about separation, not hours.
If you use, you don’t drive on your own judgement of feeling fine.
Because your judgement reads Clock 1 and the law reads Clock 2. You cannot make this decision in the moment with the keys in your hand, because in that moment the only information you have is the wrong information.
Not on the day. If there’s any chance, the car doesn’t come, and that is settled before the weekend, not with the keys in your hand.
Not a document. The thing that pays the mortgage, and the most valuable item you own that somebody else can take off you.
Thirty seconds in a cab or a canteen. Ignorance is the actual problem here, and the people who now know are the fix.
Built around how the law actually works, and around a shift pattern rather than a classroom. The workplace course is the one we deliver. The pack is the one your managers run.
Half day, on-site, anywhere in the UK. One cohort, delivered by our trainer.
One price per course. No cap on numbers.
The 15-minute version your managers run on every shift.
Annual licence, per depot or per company.
Get the packFor individuals facing a charge, or who want the full knowledge. Coming soon.
Tell us where you are and when your drivers and managers are on site. One enquiry is enough.
One cohort, one session, delivered by our trainer. Anywhere in the UK, expenses charged at cost.
Then licence the Pack for the shifts and sites we didn’t reach, so your own managers keep it running.
He called the police on himself after a minor collision, passed the breathalyser, and was convicted for a substance he had never heard of.
Four years on, he still hasn’t met a member of the public who knows what he was actually convicted for. We exist so that no driver finds out the way he did: in a police station, from a law nobody had ever explained to them.
Plain-English guides written to the same standard as the training: every claim sourced, no guesses.
The honest answer, why no calculator can exist, and what the law measures instead.
When they can test, what refusing actually costs, and what happens at the station.
The stages from a flagged swab to a charge decision, and what the adverts are selling.
Book the workplace course: half a day, on your site, anywhere in the UK, and every attendee leaves knowing what BZE is. For the shifts we don’t reach, your managers run the pack.
Clock 2 is still running at the bottom of your screen. It has been since you scrolled past it. That is the whole point of this site.