The medical-psychological assessment is colloquially called the idiot test, and the nickname misleads. It is not ordered as punishment but where the authority doubts a person’s fitness to drive. The regulation sets out the grounds for such doubts fairly concretely.
When a medical-psychological assessment is ordered
The MPU is ordered not for the gravity of an offence but where fitness to drive is in doubt. The grounds are listed in the regulation, with alcohol and controlled substances treated separately.
✓ Verified: 02/08/2026
WHAT TO DO
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Max recommends:
Friends quoted entirely different numbers and insisted there is no MPU the first time round. My order cited a specific ground from the regulation, and it was nothing like the one I had been told about.
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Lea recommends:
The only reliable source on the reason is the order itself. It always states which circumstance triggered the doubts. That is where you start, not on forums.
FREQUENTLY ASKED QUESTIONS
At what alcohol level is an assessment ordered? ▾
The regulation names driving with a blood alcohol concentration of 1.6 per mille or more, or a breath alcohol concentration of 0.8 mg per litre or more. Alongside it stand repeated offences under the influence of alcohol and indications of alcohol abuse.
Is an assessment ruled out below that level? ▾
No. Besides the threshold, the regulation names other facts supporting an assumption of alcohol abuse, and repeated offences. The decision therefore does not rest on a single figure, and what matters is the ground stated in your own order.
What applies to controlled substances? ▾
Separate rules exist for them apart from alcohol, and the standard is stricter. The substance and the circumstances matter, which makes generalisation particularly unhelpful here — read the specific provision the authority relies on.
Is the assessment ordered because of points? ▾
Reaching eight points leads to withdrawal in itself rather than to an assessment. At the later fresh grant, however, the authority examines fitness, and there an assessment becomes likely. The exact connection follows from the decision in your case.