Mirror, signal, manoeuvre: the routine examiners watch for

Mirror, signal, manoeuvre is the routine the Highway Code asks for before you change speed or direction: check your mirrors, signal if it would help others, then act. DVSA pairs it with position, speed, look, often shortened to MSPSL. Examiners mark mirror checks that come late or not at all.

Mirror, signal, manoeuvre step by step

1. Mirror: check the interior mirror, then the door mirror on the side you are moving towards. Do it in good time, before you signal or change speed or direction (rule 161).
2. Signal: signal if it would help or warn anyone, clearly and in good time, and never where it could mislead (rule 103).
3. Position: move to the right place on the road for what you are about to do.
4. Speed: slow down and choose the right gear.
5. Look: look into the new road or lane, decide, and go only when it is safe.

Mirrors have blind spots, so look round as well when you move off or change lanes (rules 159 and 161).

Which mirror, and when

• Turning left: interior mirror, then the left door mirror, watching for cyclists on your left.
• Turning right: interior mirror, then the right door mirror, for anyone about to overtake.
• Changing lanes: mirrors, a quick look over your shoulder if needed, then signal (rule 133).
• Slowing down or stopping: interior mirror first, so you know what is behind you.
• Moving off: all mirrors, a look over your right shoulder, then once more before you go (rule 159).
• Roundabouts: mirrors on the approach, and again before you signal left to leave (rules 184 and 186). Our roundabout rules guide covers the lanes and signals.

What the examiner looks for

The examiner wants to see you use the interior and door mirrors when you change direction, change lanes and change speed. Typical faults on the result include:

• checking the mirrors after you signal, or at the same moment
• changing lanes on a roundabout or dual carriageway without checking the mirrors properly
• signalling but not turning, or signalling right at a roundabout when you are going ahead
• signalling too late to be useful

Not using mirrors correctly when changing direction was the second most common reason for failing in DVSA's list for April 2024 to March 2025. A fault repeated often enough can become a serious one; see how minor, serious and dangerous faults are graded.

You do not need to exaggerate your head movements. Examiners are trained to see whether you really looked.

Make the routine automatic

The routine only protects you if it happens without thinking. For a week of lessons, say the five steps in your head at every junction until the order sticks.

Practise it where it matters most: the junctions and roundabouts on the roads around your test centre. The same all-round checks come before every reversing exercise, including pull up on the right and reverse. For blind spots and lane changes in more detail, read our observation guide, and for the full plan see how to pass your driving test.

Frequently asked questions

What does MSPSL stand for?

Mirror, signal, position, speed, look. DVSA's learning guidance pairs the mirror, signal, manoeuvre routine with position, speed, look.

Do you always have to signal?

No. Signal when it would help or warn other road users. DVSA expects you to recognise when a signal is not needed, and Highway Code rule 103 says never to give one that could mislead.

Should you check your mirrors before slowing down?

Yes. Rule 161 says to check your mirrors in good time before you change speed, so you know what is behind you before you brake.

Sources

• The Highway Code: Using the road (159 to 203)
• The Highway Code: General rules, techniques and advice (103 to 158)
• Ready to Pass: Observation, signalling and planning
• Ready to Pass: Driving test myths
• GOV.UK: Understanding your driving test result
• GOV.UK: Top 10 reasons for failing the driving test in Great Britain

Last checked: 13 October 2026.