Even with a prescription, EV drivers must stay under the 2mcg/L THC limit. A...

https://sergioxljg203.cavandoragh.org/can-you-be-prosecuted-for-drug-driving-even-below-the-thc-limit

Even with a prescription, EV drivers must stay under the 2mcg/L THC limit. A medical defence exists, but DVLA rules remain key. Being prescribed cannabis is legal, but it doesn't excuse impairment. Legality doesn't replace personal responsibility.