§ Mrs. Gillan
To ask the Secretary of State for the Home Department when the impairment tests which do not require the use of equipment will be introduced; and when the code of practice will be published. 
§ Caroline Flint
We expect impairment tests which do not require the use of equipment to detect drivers who are under the influence of drugs to be introduced later this year. A Code of Practice is currently under preparation and will be published prior to the introduction of the tests.