Vehicle Headlight Glare Standards

Olly Glover Excerpts

Wednesday 29th October 2025 Westminster Hall

[Olly Glover (Didcot and Wantage) (LD)]

It is a pleasure to serve under your chairship, Mrs Harris. I join other hon. Members in commending the hon. Member for Crawley (Peter Lamb) for bringing this very important topic to Westminster Hall and, indeed, for his impressive efforts in getting media coverage before the debate had even occurred—I might ask him later for his tips on that, if he might be so generous, because hitherto I have not had quite such success, but it is very good to see. He is quite right to talk about the fear of driving at night that this issue instils and offers some good tips for mitigating the effects.

My hon. Friend the Member for Melksham and Devizes (Brian Mathew) talked about the economic impact of reduced night driving and the problem of automated light dimming—I shall return to that subject, because I have some very strong views about it. The hon. Member for Hemel Hempstead (David Taylor) joined other hon. Members in talking about the rural context and how important night-time driving is for people who live in rural areas and for the rural economy. It was once again great to hear the hon. Member for Leicester South (Shockat Adam) bring his professional optometrist’s experience to the debate and quite rightly highlight the impact of the issue on elderly people’s mobility, as well as the safety aspects of those who continue driving even though their eyesight may be compromised.

My hon. Friend the Member for Newton Abbot (Martin Wrigley) gave us an excellent summary of his very strong and robust campaigning on this issue, which this debate will hopefully accelerate. The hon. Member for Strangford (Jim Shannon) was very articulate about the need to strengthen MOT requirements and the fact that the data under-represents the problem at hand, a point also made by my hon. Friend the Member for Honiton and Sidmouth (Richard Foord).

Following a petition with more than 14,000 signatures, the previous Government committed to commissioning research into headlight glare, a project that was taken up by the current Labour Government, with the results eagerly expected. While LED headlights improve driver visibility and energy efficiency, they can cause discomfort or temporary blindness to oncoming drivers. An RAC survey in December 2024 found that 95% of drivers believe some headlights are too bright, with 53% reporting being temporarily blinded and 25% avoiding night driving altogether because of glare.

Research shows that glare particularly affects people with cataracts or other vision issues. Headlight alignment and condition are checked during the MOT test, yet overly bright lights can still pass if technically compliant. There are concerns about poorly aligned or aftermarket LED conversions sold online; police reports list dazzling headlights as a factor in around 200 to 300 collisions annually in Great Britain. However, as hon. Members have suggested, that is almost certainly an underestimate.

The UK raised the issue at the UN Economic Commission for Europe, which agreed to tighten rules on headlamp alignment and to make automatic levelling systems mandatory by 2027. Ongoing Government-funded research by the Transport Research Laboratory will include real-world glare assessments across different road types.

This issue is close to my heart, because my Oxfordshire constituency of Didcot and Wantage has many rural components, and my main method of transport around the constituency is a bicycle. I assure the hon. Member for Crawley that I certainly do not use a flashing light outside street-lit areas, nor am I one of those covered in dark clothing who is invisible. However, despite wearing high-vis clothing with retroreflective strips and having panniers with retroreflective elements, a front light, a rear light and loads of reflectors, I encounter a growing problem of car drivers taking too long to dip their headlights. Often it is so bad, particularly on roads that do not have a white line, that I just have to stop until the offending vehicle has gone—perhaps after some creative hand gestures in front of my light, as a last-minute attempt to make sure that they see me.

Some people dip their headlights and others do not, so it seems unlikely that it is to do with my visibility. I therefore wonder whether the automation that some hon. Members have mentioned is the factor; possibly some drivers rely on that, whereas others are observant, keeping a close eye and dipping as soon as they can. I can say from my experience as a cyclist that this is a real safety issue: if somebody is behind me when I have to stop suddenly, they will not be expecting to have to stop too.

The Liberal Democrats welcome the Department for Transport’s decision to commission an independent review into headlight glare and we urge the Government to develop an updated road strategy including vehicle design, including lighting, within its scope. I know that that is something they are working on. We are deeply concerned about increasing reports of overly bright or poorly aligned LED headlights causing discomfort, temporary blindness and heightened safety risks for other road users, including drivers, cyclists and pedestrians. For all those reasons, this debate is very welcome and I look forward to hearing the Minister’s response to it.