Another drug-driving conviction for allegedly having too much cannabis has been overturned by a court because of concerns about lab tests.

Gavin Clarke, defending at Llandudno court, said his client had appeared in court last October. But a recent investigation showed lab results weren’t reliable.

The lawyer said: "It does cast doubt on the safety of the conviction.”

The Crown Prosecution Service offered no evidence after the case against Kimberley Smith, aged 40, of Maes yr Orsedd, Llandudno, was reopened.

A district judge said she was of good character.

Last week a 30-year-old man who pleaded guilty to drug-driving with too much cannabis in his blood was also cleared after doubts emerged about the reliability of the lab tests.

Dale Williams-White, from Liverpool, had admitted the offence at Mold magistrates’ court and received a three-year ban in October 2019 on the basis of a forensic report.

But defence solicitor Chris Dawson told magistrates at Wrexham :”It’s come to light the blood analysis upon which the case was presented, which Mr Williams-White took into account, is no longer reliable.”

The company which signed off the forensic report had sub-contracted the analysis and a regulatory body had ascertained there were shortcomings in the quality assurance process.

Mr Dawson said his firm had since been contacted by the Crown Prosecution Service. The court agreed to reopen the case and the CPS offered no evidence.

Prosecutor Rhian Jackson said the blood sample was no longer available so couldn’t be re-tested.

Following the case, Mr Dawson, of solicitors Humphrys Dawson, said :”Anyone who has got a cannabis drug-driving conviction in recent times really should review their position and consider whether in their case they may have been convicted wrongly.

“It is really concerning. The potential impact on defendants could be huge. People could be disqualified from driving and subject to community orders or even sent to prison.”