The soaring July temperatures have caused Brits to don their flip flops as thermometers hit 32C.
However, wearing flip flops behind the wheel could lead to a careless driving charge if the footwear is deemed to impact their driving ability.
While driving in flip flops isn’t illegal, Rule 97 of the Highway Code advises motorists that they must have “footwear and clothing which does not prevent you using the controls in the correct manner”.
Flip flops could become wedged under pedals, fall off or stop drivers from hitting the pedals with enough force to brake effectively, which could lead to an accident.
Motorists who are stopped by the police could be charged with driving without due care and attention if wearing flip flops has affected their driving. The charge carries a £100 on-the-spot fine and three penalty points.
In more serious cases, drivers could find themselves in court and slapped with a maximum fine of £5,000, nine points on their license and a driving ban.
Insurance company Ingenie conducted a study that found that 27% of UK drivers could be risking this penalty by ditching sensible shoes in favour of flip flops.
Neil Greig, Director of Policy and Research, at IAM RoadSmart said: “Before setting off, you should ensure that clothing and footwear do not prevent you from using the controls in the correct manner.
“If flip flops stopped you being in control you could be prosecuted, as you are breaking Highway Code Rule 97.
“Careless driving is mostly judged on the impact your driving has on others around you, so if you are spotted swerving or braking erratically and then stopped and found to have inadequate footwear, you could be prosecuted.
“If you do cause a crash, then it could also be an aggravating factor against you in court and lead to a slightly higher fine or longer ban.”
Selim Cavanagh, Chief Executive at Ingenie, said: “It’s promising that almost a third of drivers assume driving in flip flops is illegal because it’s really dangerous.
“They slip off, slide under the pedals, get caught between your feet and the pedals and if your feet are wet, they’ll affect your ability to brake if you need to. Aside from the actual rules though, driving in flip flops can create a dangerous driving environment, and put you, your passengers, and other road users at risk.”