Chief Constable of Gwent v Dash: 1986

In the absence of malpractice, oppression, caprice or opprobrious behaviour, there is no restriction on the stopping of motorists by a police officer in the execution of his duty and subsequent requirement of a breath test if the officer then and there genuinely suspects the ingestion of alcohol.
Lloyd LJ said: ‘The word ‘malpractice’, as it has come to be used in this field, seems to me to cover cases where the police have acted from some indirect or improper motive or where the conduct on the part of the police could be described as capricious. The random stopping of cars under section 159 of the Road Traffic Act 1972 for the purpose of detecting crime, or for inquiring whether the driver has had too much to drink, cannot be so described. Nor can it be said that the police were acting from some indirect or improper motive. However much the public may dislike the random stopping of cars, I cannot agree that random stopping by itself involves malpractice, and if Donaldson LJ said otherwise in Such v Ball to which Macpherson J has referred, then, I would very respectfully disagree.’
Macpherson J said: ‘in summary, therefore, the police are, in my judgment, not prohibited from the random stopping of cars within the limits already referred to; but are, of course, prohibited from requiring breath tests at random, which is a very different thing. That distinction must always be borne in mind.’

Judges:

Lloyd LJ, Macpherson J

Citations:

[1986] RTR 41

Statutes:

Road Traffic Act 1972 159

Cited by:

CitedBeckett, Regina (on The Application of) v Aylesbury Crown Court Admn 22-Jan-2004
The applicant had unsuccessfully appealed against his conviction for driving with excess alcohol. He had been stopped randomly to check his documents and the road worthiness of the older car.
Held: The appeal failed. May LJ said: ‘Whether it . .
Lists of cited by and citing cases may be incomplete.

Road Traffic, Police

Updated: 02 May 2022; Ref: scu.425323