Hundreds of drug-driving prosecutions have been called into question following a review of lab tests. More than 1,700 results where drug levels were reported to above the legal limit have had to be withdrawn.
Synlab Laboratory Services Limited identified problems with its tests in December 2020. A review has since been conducted by police and the forensic science regulator.
On Monday (January 30), the National Police Chiefs’ Council (NPCC) said all drug-driving tests produced by Synlab between April 2019 and December 2020 where levels were found to be above the prescribed limit must be withdrawn.
In that period, the company analysed 4,255 samples. Of these, 2,181 had no drug present or a level of drug below the prescribed limit.
There were 296 samples from cases which were discontinued or there was no conviction at court. The remaining 1,778 samples had drug levels reported by Synlab to be above the prescribed limit.
The Crown Prosecution Service is in the process of contacting those whose samples have been withdrawn.
NPCC lead for forensics, Chief Constable Nick Dean, said: “This has been a lengthy and in-depth review, which I know has been hugely challenging for those individuals who are impacted by the results. I would like to commend their patience while we have worked through the data.
“The reviews were done at such a detailed level because we are committed to ensuring evidence entering the courts is reliable. We take any issues seriously and wanted to ensure due diligence was taken to achieve the correct outcome.
“Synlab have been very forthcoming and open during the reviews, which we welcome. I want to thank all our partners who have spent many hours reviewing and working hard to try and get this right.
“It is hugely regrettable whenever evidence that has been submitted to the courts in good faith has to be withdrawn. We know that this will have significant knock-on effects for people.”
