Drug driving is a serious offence and the police, the Driver and Vehicle Licensing Agency (DVLA), and other organisations, use what is known as endorsement codes to classify offences. All the codes explained here on this page are related to drug driving...
LC20 to LC50 offences must stay on a driving licence for 4 years from the date of the offence.
Driving otherwise than in accordance with licence
Driving after making a false declaration about fitness when applying for a licence
Driving a vehicle having failed to notify a disability
Driving after a licence has been revoked or refused on medical grounds