Question to the Department for Transport:

To ask the Secretary of State for Transport, pursuant to the Answer of 21 July 2026 to Question 18370 on Driving under Influence, which countries' use of roadside evidential drug-testing devices her Department has assessed; and whether it has assessed the (a) accuracy, (b) enforcement benefits and (c) effect on the time taken to process suspected drug drivers of those devices.

The Department has not specifically assessed other countries’ use of roadside evidential drug-testing devices, including their accuracy, enforcement benefits or effect on processing times.

We consulted on alternative specimens for drug-driving forensic analysis, not specifically on introducing roadside evidential devices. Responses are being analysed.

The Department has supported exploratory work on roadside evidential drug-testing capability, including the Mobile Evidential Drug Testing Instrument (MEDTI) Demonstrator. Any change to evidential testing arrangements would require further scientific, legal and operational consideration.