Even perfectly adjusted mirrors leave a blind spot — an area directly to the side of your vehicle that no mirror can cover. On UK roads, that blind spot is frequently occupied by cyclists, motorcyclists, or pedestrians. Turning without checking it is one of the most dangerous faults a learner driver can make.
By the Numbers
Observation faults at junctions are the single most common serious fault recorded on UK driving tests, according to DVSA annual statistics (gov.uk/government/statistical-data-sets/car-driving-test-data-by-test-centre). Failing to check blind spots when turning contributes directly to this category. The UK car test pass rate is approximately 45–48%, and observation failures are a leading reason why the majority of candidates do not pass on their first attempt.
What Is a Blind Spot?
Your blind spot sits just behind your shoulder on each side — the area your peripheral vision and mirrors don't reach. When you turn left at a junction, a cyclist travelling along the kerb may have moved into that space without appearing in your left mirror. When you turn right, a motorcyclist passing on your outside may be invisible in your centre mirror.
The Correct Technique
Use the relevant mirrors early and check the area they do not show before changing direction or position. A brief shoulder check may be appropriate when a cyclist or motorcyclist could be alongside, but do not turn so far or for so long that you lose awareness of the road ahead. The check must fit the situation.
- Turn your head — don't just roll your eyes to the side.
- Recheck immediately before committing if the situation may have changed.
- If you see a cyclist, wait and give way before turning.
Why Learners Forget
Concentration demand is high at junctions — you're watching traffic, reading road markings, managing speed and steering. The blind spot check can get dropped when cognitive load peaks. The solution is to make it a physical habit that triggers automatically as part of the junction routine, not an optional extra.
Practice tip
In the UK, especially in city centres and residential streets, cyclists are a constant presence. They often travel at 15–20mph and can appear quickly from behind. Always assume there is a cyclist in your blind spot until a physical check proves otherwise.
Frequently asked questions
- Is checking the mirror enough, or do I have to physically turn my head?
- Mirrors do not cover every area. Use an appropriate blind-spot or shoulder check when another road user could be alongside, while keeping control and awareness of the road ahead.
- When exactly should I do the blind spot check?
- Check early enough to act on what you see, then reassess before changing direction if a cyclist or motorcyclist could have moved alongside since your first observation.
- Do I need a blind spot check when changing lanes on a dual carriageway?
- Yes. The blind spot check is essential any time you move laterally, including lane changes on faster roads.