As many as one million motorists have driven while under the influence of drugs, a survey has revealed.
Even more drivers appear to have no objection if a close friend intends to drive while high on illegal substances, according to the poll by road safety charity Brake.
Drug driver "is a menace" which "causes absolute devastation" to the families of victims hit by motorists who are behind the wheel while high, the head of a road safety charity said.
Brake deputy chief executive Julie Townsend explained:
The Olympians rounded off their success in Rio with a personal triumph as they confirmed they have tied the knot.
The foreign secretary called for tougher action against Russia in an effort to halt the "barbaric" attacks on rebel-held Aleppo.
Hundreds of surgeries face closure if older family doctors are not retained, the Royal College of GPs has warned.