The vast majority of driving licence holders would fail the latest theory test if they had to retake it now, research suggests. The study by Direct Line found that among a sample of 2000 UK Adults (aged 16 and over), 95% failed a condensed version of the exam featuring 15 randomly picked questions from the real test.

The actual test features 50 questions which must be completed within 57 minutes. Drivers have to get at least 43 of them right to pass (an 86% score). This equates to a 13 out of 15 score on the car insurer's mock test, which hardly any of the qualified drivers were able to achieve.

On the official theory test, prospective drivers also have to achieve at least 44 marks out of 75 in a hazard perception test which is based on 14 videos of real-life situations.

Other findings included that only a fifth of drivers were aware of where it is legally acceptable to overtake on a one-way road, and a mere 41% were able to identify the "Cycle Route" road sign.

Meanwhile, less than half (49%) of drivers tested knew when to use the right-hand lane on a three-lane dual carriageway, the equivalent of 21 million drivers.

Additionally, under half (45%) could accurately state the overall stopping distance when travelling at 40mph, (36 metres).

The study found people in the Gen Z age range (18-28) were the most likely to pass with a 10% success rate. This was followed by Millennials on 9%, Gen X (3%) and Boomers (2%).

77% of Gen Z also said they proactively keep themselves informed of the latest road rules, compared to less than half (45%) of Gen X and Boomers.

From next year, theory tests will feature new CPR questions, as well as questions about defibrillators for the first time in a bid to boost cardiac arrest survival.

Matt Pernet, head of motor insurance at car insurer, said: "The Highway Code covers safe and responsible driving behaviour on UK roads, and it is not just new drivers that need to know what is included.

"Staying up to date with the rules is vital, especially when changes are made which relate to right of way and road signs.

He said the findings are a "stark reminder that many people are not keeping up to date with the latest rules and should serve as a wake-up call to encourage all drivers to regularly refresh their knowledge".