All 37 UK of the cars the government test in the wake of the automotive emissions scandal that began with VW last year exceed laboratory emissions standards in real-world conditions. However none of the vehicles tested in the UK programme showed evidence of defeat devices except VW models.

The UK government published its research into emissions levels from leading diesel car models, fulfilling a commitment to consumers to investigate potential manipulation of emission controls, on 21 April 2016 – just as leading car manufacturers (beginning with Mitsubishi) began making statements about their involvement in the emissions scandal.