Possession of banned drugs is illegal, being under the influence while driving is illegal
Not sure consuming drugs is illegal, so tests that show someone has taken a drug, but doesn’t discern whether it’s a sufficient amount to impair driving is going to be a great test.
Pretty sure taking drugs IS illegal in the UK. I guess you might have just returned from somewhere where it is legal and still have legal traces in your system.
Possession of banned drugs is illegal, being under the influence while driving is illegal
Not sure consuming drugs is illegal, so tests that show someone has taken a drug, but doesn’t discern whether it’s a sufficient amount to impair driving is going to be a great test.