Question to the Department for Transport:

To ask His Majesty's Government what proportion of cars that have been sold in the past five years are fitted with headlights which, once dipped, cause dazzle to oncoming traffic; and what discussions they have had with Euro NCAP on that matter.

Prior to sale and registration all vehicle manufacturers must demonstrate that the mandatory dipped beam headlamps satisfy detailed technical requirements controlling aim and light emitted to minimise the occurrence of glare to oncoming traffic. In addition, the Government recently committed to carrying out independent research to assess the prevalence of headlamp glare and to identify root causes and potential countermeasures. EURO NCAP does not assess vehicle lighting and no associated discussions have taken place.