Manchester lab's drug tests may have been manipulated

Two employees of Randox Testing Services arrested, with 484 police inquiries based on toxicology results under review

Hundreds of drug tests may have been manipulated by staff at a forensics lab, with almost 500 police investigations under review.

Two employees of Randox Testing Services (RTS), which analyses blood, saliva and hair samples on behalf of police forces, have been arrested by Greater Manchester police.