With sun glare becoming a bigger issue on UK roads as summer approaches, drivers are being urged to carry one simple item in their glovebox that could help them avoid hefty fines, penalty points, and potentially dangerous driving conditions.

Experts are now warning that sudden, intense sunlight can reduce visibility behind the wheel, making it crucial for motorists to be prepared. Their advice? Always keep a spare pair of legal sunglasses in your car.

Sun glare can appear suddenly and completely obscure your vision, especially during early morning or late afternoon driving. Having a spare pair of sunglasses within easy reach could be the difference between driving safely or committing a serious offence.

Although it's not a legal requirement to wear sunglasses while driving, the Highway Code Rule 237 states that drivers must slow down or stop altogether if they are “dazzled by bright sunlight.” Failing to do so could be seen as driving without due care and attention, which carries a £100 on-the-spot fine and three penalty points.

In more serious incidents, police can escalate the offence to dangerous driving, where fines can reach £5,000, along with higher penalty points or a potential driving ban.

Being dazzled by the sun and continuing to drive without slowing down could be seen as reckless. You don’t need to be in a crash for it to be a legal issue — the risk alone can result in a penalty.

However, not all sunglasses are road-safe. Dark-tinted 'category four' lenses, fashion frames with small lenses, or glasses with oversized side arms may obstruct vision or peripheral awareness, and wearing these while driving could also lead to prosecution.

Drivers need to be aware that some sunglasses are actually unsafe for road use. Stick to category two or three lenses, which reduce glare while maintaining clear visibility.

Motorists who already wear prescription lenses are advised to consider prescription sunglasses or anti-glare coatings, especially for vehicles without built-in tinting or sun visors.