How Flip Flops and the Wrong Sunglasses Could Cost Summer Drivers £100 and Three Points

The first warm spell sends millions of drivers reaching for flip flops, sunglasses and hay fever tablets, and any one of the three can land you with a fine and points if it goes wrong. None of them is banned outright, which is exactly why drivers are caught out. The law does not care what you are wearing or taking until it stops you controlling the car safely, and at that point a relaxed summer drive can turn into a £100 fine, three penalty points or, in the worst cases, a charge that carries an unlimited fine. Here is what the rules actually say and how to stay on the right side of them.

The footwear rule that catches summer drivers out

There is no specific law that says you cannot drive in flip flops, sandals or even bare feet. The rule that applies is Rule 97 of the Highway Code, which states that the clothing and footwear you choose to wear must not prevent you from using the controls in the correct manner. It sounds vague, and that vagueness is the trap. A flip flop that slips off the pedal, wedges under the brake or stops you pressing the clutch fully has, in the eyes of the law, prevented proper control of the vehicle.

If a police officer judges that your footwear is interfering with your driving, the likely outcome is a fixed penalty of £100 and three penalty points for driving without due care and attention. Should the matter reach court, the ceiling is far higher: a fine of up to £5,000, as many as nine penalty points and a possible disqualification. The same logic applies to high heels, which can catch on the carpet, and to driving barefoot, where a wet or sweaty foot can slip off the pedal at the wrong moment. The safest approach is to keep a pair of flat, secure driving shoes in the car and change into them before you set off, leaving the flip flops for the beach.

Why the wrong sunglasses are a legal risk

Sunglasses are sensible kit in bright sun, but the wrong pair can put you on the wrong side of the law. Lenses are graded by a filter category from 0 to 4, usually printed on the inside of the arm. Category 4 lenses are the darkest, transmitting only 3 to 8 per cent of light, and they are not legal for driving at any time of day or night. They are designed for intense glare on a ski slope or at high altitude, not for the road, and many people own a pair without ever checking the rating.

The bigger risk is timing. A pair of dark glasses that is fine at midday becomes dangerous as the light fades, in a tunnel, or under heavy cloud, because they cut too much light for you to see clearly. Keep them on when you can no longer see properly and you could be accused of careless or even dangerous driving. The most serious version of that charge can bring an unlimited fine and up to 11 penalty points. Rule 237 of the Highway Code is also worth remembering: if you are dazzled by bright sunlight, you should slow down and, if necessary, pull over until you can see again. Reaching for category 4 lenses is not the answer, and neither is squinting on through glare you cannot handle.

The practical advice is to drive in category 0 to 3 lenses, check the rating before you buy, and take the glasses off the moment the conditions change. A pair that lifts easily on and off is far more useful behind the wheel than the darkest lenses you can find.

The hidden danger in your hay fever tablets

The third summer hazard is the one most drivers never think of as a driving offence at all. Hay fever season sends millions reaching for antihistamines, and the older, sedating types can cause drowsiness, blurred vision and slower reaction times. UK law treats driving while impaired by medication in much the same way as drug driving, and it makes no difference whether the medicine was prescribed or bought over the counter at a supermarket.

If you drive while impaired by a medicine and are involved in an incident, the penalties are severe, running to an unlimited fine, a driving ban and even a prison sentence in the most serious cases. The danger is that a drowsy antihistamine does not feel like being over the limit; it feels like ordinary tiredness, which is easy to push through. Before driving, read the label on any hay fever or cold remedy and look for warnings about drowsiness or operating machinery. Where a warning appears, choose a non drowsy alternative, or wait until the effect has worn off before getting behind the wheel. The same caution applies to stronger painkillers and some prescription medicines.

How to stay on the right side of the law this summer

None of this means summer driving has to be a minefield. The three risks share a single fix: think about control and visibility before you set off, not after something goes wrong. Keep a pair of proper driving shoes in the footwell so you are never tempted to drive in flip flops. Check the filter category on your sunglasses and keep them to 3 or below, and take them off as soon as the light drops. Read the label on any hay fever remedy and pick a non drowsy version if you are going to drive.

It is also worth remembering that these offences usually come to light only when something else happens, such as a near miss, a minor collision or a routine stop. An officer who pulls you over for one reason can add a careless driving charge if your footwear or eyewear is clearly a factor, and an insurer can question a claim if your ability to control the car was compromised. A few seconds of preparation removes the risk entirely. For more on driving through the warmer months, see our guides to the heat related risks to your tyres and the rules on keeping the right tyres fitted in the first place.

Why your insurer cares as much as the police

The penalty points and fines are only half the story. If you are involved in a collision and footwear, eyewear or medication is found to have played a part, your insurer can argue that you were not in proper control of the vehicle. That can reduce a payout or, in some cases, give grounds to reject a claim altogether, leaving you to cover the cost of repairs and any third party damage yourself. A flip flop jammed under the brake pedal stops being a minor wardrobe choice and becomes a contributing factor in an accident report.

It is also worth knowing that careless driving endorsements stay on your licence and push up premiums for years. Three points from a single summer slip can add a noticeable sum to your renewal, and the increase often outlasts the points themselves. Set against that, the cost of a cheap pair of driving shoes, a sensible set of sunglasses and a packet of non drowsy antihistamines is trivial.

The common thread across all three hazards is that they are entirely avoidable with a little forethought. The drivers who get caught are almost never the ones who set out to break a rule. They are the ones who grabbed whatever was nearest on a hot day and only discovered the problem when a pedal slipped, a junction blurred or an officer asked a question. Treating the warm months with the same care you would give an icy road keeps both your licence and your insurance intact.

Sources:

• The AA: Driving in sunglasses, know the law
• GB News: Drivers risk fines and points over Highway Code footwear rules
• Legal Overview: Is it illegal to drive in flip flops?
• GB News: Drivers risk a fine over the wrong sunglasses
• Motoring Chronicle: What record heat means for your tyres