Question to the Department for Transport:
To ask the Secretary of State for Transport, how many vehicles have failed MOT tests because of the removal of diesel particulate filters in each of the last three years.
The requirement to inspect diesel particulate filters as part of the MOT test was introduced on 19 February 2014; no information is available from before this date. Between 19 February 2014 and 17 October 2014, 347 vehicles with diesel engines failed the MOT test due to a missing diesel particulate filter.