The Highway Code states that drivers must slow down or pull over if dazzled by bright sunlight and if you don't (and you're not wearing sunglasses to protect your eyes), you could be convicted of careless driving.
If caught, you may receive an on-the-spot fine of £100 and up to three penalty points on your licence, or you could go to court where the fine can be increased up to £2,500 and nine points.
However, as reported by The Plymouth Herald, you can actually be breaking laws while driving with sunglasses on too.
The reason for this is because sunglasses are divided into four categories based on the amount of light they filter out, with some being acceptable to wear while driving and others illegal.
Most sunglasses are category two - meaning that they filter between 18 and 43 per cent of light and are suitable for driving.
If you have category four sunglasses, which let less than eight per cent of light through, you're breaking the law.
Please see this handy guide below to help you work out which category of sunglasses are most suitable for your needs.