I thank noble Lords. I should make it clear to my noble friend Lord Teverson that there is an existing Section 4 offence that is used to deal with driving under the influence of drugs not specified for the purpose of the new offence. That remains in place. The existing drug-impaired driving offence remains, and therefore all drug-impaired drivers can be prosecuted, whatever and how many drugs they have taken. I give him that assurance. There is a process to add drugs to the list of specified drugs. I will write to my noble friend with the details of how drugs can be added in that process. There is both the broad brush and the ability to add new drugs to the
list. For a new drug to be covered by the new offence, the following are necessary: the drug has to be recognised and classified by the Home Office under the Misuse of Drugs Act 1971; a consultation would then need to follow on whether to add it to those specified under the offence of drug-driving and at what level to set the specified limit; and regulations would need to be approved under the affirmative procedure. So there is a procedure in place to add to the list.
I am sure the noble Lord, Lord Rosser, will correct me if I have misunderstood this, but one of his questions was essentially about whether or not there should be a difference between the sentencing for impairment caused by alcohol and that for impairment caused through drug use. The rationale to me is that identifying the specified drug is step one, and then defining the level above which having that drug in one’s system is the standard of impairment for the offence is step two. That, essentially, is the way in which this legislation works. In other words, first, the drug is identified—I have read out the process that is gone through to get a drug on the list, which obviously involves consultation—and, secondly, the limit above which that drug in the system would be considered an offence is determined. The noble Lord will understand that that is, in many ways, the same as the approach used with alcohol. It is illegal to drive with above a certain limit of alcohol in the system.
The noble Lord also asked about testing equipment. We understand that 12 forces at present have station-based screening devices. Manufacturers are talking widely to various forces, who are obviously considering whether to purchase devices to enhance their capacity to enforce. Mobile screeners are also available. The new mobile screener tests only for cannabis and cocaine, but those are two of the most prevalent types of drugs detected among drug drivers. Again, police forces manage their budgets and so they must decide how to use their budget to acquire equipment for enforcement.