Skip to main content

Drug Driving Solicitors

At Cartwright King we understand that drug driving can be committed unknowingly by the respective driver as many legal drugs can cause side effects deemed as dangerous when operating a vehicle. If you are caught drug driving, you could be faced with a driving ban and a potential prison sentence which can affect your overall future quality of life. We are available to represent you throughout the entire legal process.

Free initial telephone consultation

Our highly skilled Motoring team are here to take the worry off your hands. We can provide an initial telephone consultation to see how we can assist in your case. For more information, please call Andy Cash on 0808 168 5550 or email

Drug driving and the law

For many years it has been illegal to drive a motor vehicle when the level of alcohol is over the legal limit. It has also been illegal to drive while unfit to drive because of taking drink or drugs.

The law has now been amended to make it an offence to drive while the level of certain drugs in your body is over limits set by the Government. This new offence does not require any evidence that your driving has been impaired or made worse by the drug in your body. It simply requires evidence that the drug is there above the prescribed limit.

The Police have roadside saliva tests that enable them to check for the presence of cannabis and cocaine. If there was a positive test they would then seek a blood sample and the results of testing that sample would determine whether or not you were prosecuted.

Which drugs does this include?

The list of prohibited drugs includes many that are prescribed to people by their doctors. 

The offences carry the same penalties as the related drink offences.

We advise that you always check with your Doctor or health service provider about the use of any prescribed drug. Do not stop taking medication because of this legislation. Do contact Cartwright King for advice if you are in any doubt about your rights or are facing a prosecution under this legislation.

Table of drugs and limits

‘Illegal’ drugs (‘accidental exposure’ – zero tolerance approach)    Threshold limit in blood
Benzoylecgonine 50µg/L
Cocaine  10µg/L
Delta-9-tetrahydrocannibinol (cannabis) 2µg/L
Ketamine 20µg/L
Lysergic acid diethylamide   1µg/L
Methylamphetamine 10µg/L
MDMA   10µg/L
6-monoacetylmorphine (heroin) 5µg/L

How can we help you?

Cartwright King are available to present your case in court and take into consideration all the factors surrounding your circumstances. You can be assured that you will receive the essential, high quality legal advice and representation that our solicitors have to offer.

Why Choose Us?

At Cartwright King, our solicitors understand the stress that being accused of drug driving can cause and what the potential severe consequences can have on you, your family and your career. We are available to support you throughout the entire process, explaining the likely outcomes and fight on your behalf.

How to make contact

If you require any legal advice or if you would like a no obligation, free initial telephone discussion, then please call us on 0808 168 5550. Alternatively you can email the Motoring team on and we’ll get back to you as soon as possible.

Our Motoring solicitors can provide advice across the country and are happy to meet at a time and location that suits you. We also have a network of offices in BirminghamBedfordBoltonDerbyLeedsLeicesterLondon TempleManchesterMiddlesbroughNorthamptonNottinghamSheffield and Worcester.


For further information please get in touch with our dedicated team.

You can always call us on 0845 894 1622 or email on


Let us know how we can help. Just provide a brief outline of your query.

Read more
The Legal 500 - The Clients Guide to Law Firms
Enquiry Popup