Being in the wrong lane on a roundabout is rarely what gets marked. Changing lane once you are on it is. The decision that matters happens on the approach, before the queue, at the point where the sign appears, and at Charlie Brown's and Redbridge that point is a long way further back than most learners expect.
Ask a learner what goes wrong on a big roundabout and they will say they picked the wrong lane. Ask an examiner and they will describe something else: a car that swung across a lane line halfway round, or that hesitated at the give way because the decision had not been made yet. The lane you choose is rarely the fault. What you do about it is.
The Fault Is The Change, Not The Lane
Roundabout lanes are marked so that traffic can run in parallel without crossing paths. A driver in the left lane and a driver in the right lane can both go round at the same time precisely because neither of them moves sideways. The moment one of them changes lane, that assumption breaks, and the driver in the adjacent lane has to react.
So being in the left lane when you wanted the third exit is an inconvenience. Cutting across to the right lane at the second exit is a conflict, and it will be marked accordingly. The severity depends on whether anyone had to do anything about it, which is the general principle behind how serious and dangerous faults are decided.
This has a consequence that surprises people. The safe response to realising you are in the wrong lane is to stay in it, take whatever exit it serves, and sort yourself out on the road beyond.
Taking an unintended exit is not a fault. Going all the way round again is not a fault. On the independent driving section, a wrong turn is explicitly not marked, and the same logic applies here.
What Rule 186 Actually Says
The phrase that carries the most weight is "stay in your lane". Everything else is bookkeeping around it.
Rule 184 adds the timing: use mirrors, signal and manoeuvre at all stages, and "decide as early as possible which exit you need to take". Early is doing real work in that sentence, and on the East London roundabouts it means earlier than the road appears to require.
Why The Sign Comes Before The Queue
Direction signs on a multi-lane approach are positioned so that a driver travelling at the speed limit has time to read them, choose a lane and move into it before the give way. They are not positioned for a driver who is stationary in a queue.
That produces the single most common failure pattern. You join the back of a queue, you cannot see any signs from there because they are behind you, and by the time you reach the front you are choosing a lane from painted arrows on the carriageway with two cars behind you and a gap opening in the traffic. The decision gets made in the last three seconds, or worse, gets made after you have entered.
The fix is entirely mechanical:
- Read the sign the first time you see it, while you are still moving toward the queue. Say the exit number and the lane to yourself.
- Move into that lane before you join the queue, while lane changing is still easy.
- Once you are in the queue, stop reading signs and start reading the roundabout: where the traffic comes from, how fast, and where the gaps are.
- At the give way, your only remaining decisions are when to go and what to observe. The lane question is already settled.
Separating those two jobs is most of the skill. Learners who fail here are trying to do both at the give way line.
Charlie Brown's Roundabout, Worked Through
Charlie Brown's is where the A406 North Circular meets the A113 at Woodford, and it appears on Wanstead test routes. It is a large, multi-lane, multi-level junction with heavy traffic and signals on the approaches, and it is the junction that produces more late lane changes than any other in the area.
What makes it difficult is not the roundabout itself but the run-up. The approaches carry fast traffic, the signs come at you while you are still deciding whether to change lane, and the lane markings on the carriageway are the last confirmation rather than the first instruction. If you are still looking for a sign at the stop line, you are already too late.
The three things to get right, in order:
- Know your exit by name, not by number. "Third exit" is easy to lose count of on a junction this size. "Toward Woodford" or "onto the North Circular eastbound" survives a distraction.
- Commit on the first sign. There will be another one, but treat it as confirmation, not as your chance to change your mind.
- Hold the lane through the whole junction, including where the carriageway widens on the exit. Widening is not an invitation to drift.
The Redbridge Roundabout, Worked Through
Redbridge, where the A406 meets the A12, is the other one on Wanstead routes, and it fails candidates for a different reason. It is not that the lane choice is obscure. It is that the traffic is fast enough and heavy enough that a hesitant entry is genuinely dangerous, so hesitancy gets marked harder here than it would on a quiet suburban roundabout.
Candidates arrive at the give way having done the lane work correctly, then wait for a gap that meets a standard they would never apply on an ordinary road. Three usable gaps go past. Traffic builds behind. The fourth gap gets taken in a hurry, which is when the observation fault happens.
The honest advice here is that Redbridge is a confidence problem rather than a knowledge problem, and confidence on a specific junction comes from having driven it more than twice. If your test is at Wanstead, both of these should be on your route practice list rather than encountered for the first time on the day.
Reading A Multi-Lane Approach
Most East London roundabouts fall into one of three patterns, and knowing which one you are looking at settles the lane question quickly.
| Pattern | What to do |
|---|---|
| Two lanes, arrows on the road | Take the lane whose arrow points where you are going. The arrows override any general rule. |
| Two lanes, no arrows, sign shows exits | Left lane for the exits on the left half of the sign, right lane for those on the right half. Straight ahead usually works from either, so hold the left unless the sign says otherwise. |
| Three or more lanes with signals | Treat it as a set of separate junctions rather than a circle. Choose from the sign well back, then drive the signals as they come. |
One caution on the middle row. "Straight ahead from either lane" is a common convention rather than a rule, and it is only true when the markings say so. If the left lane arrow points left only, straight ahead from the left lane is a fault whatever the convention says. Painted arrows always win.
Signals, And When They Go On
The signal errors that get marked are not usually missing signals. They are signals given at the wrong time, which tell other drivers something untrue.
- Signalling right on the approach when you intend to take an exit past twelve o'clock. Correct.
- Signalling left after you pass the exit before yours. Correct, and it is the one people forget while concentrating on the lane.
- Signalling left too early, so the driver waiting at the exit before yours pulls out in front of you. This is the one that causes actual collisions.
- Leaving a right signal on all the way round including after you have started to exit. Confusing, and marked.
How To Practise It
Lane discipline degrades under pressure in a way that most skills do not, because the decision window is short and the consequence of getting it wrong feels public. A driver who is fine on a Tuesday afternoon lesson can make a late change on a test morning at the same junction.
That means practice has to include pressure, not only repetition. Drive the actual roundabouts on your test centre's routes, at a similar time of day to your test, more than once. Then have someone mark you on them under proper conditions rather than coaching you through them, which is what a mock test is for and the only reliable way to find out whether the habit holds.
It also helps to know which faults the examiner is actually recording, rather than which ones you feel worst about, and that is set out in what the examiner marks on a driving test. The equivalent commit-early habit applies to the other decisions covered in box junctions explained and in the complete guide to learning to drive in East London.
Lane choice is one of the few things that gets worse under test pressure rather than better, which is the argument for rehearsing it under conditions that feel like the real thing.
Book a mock testCommon questions about roundabout lanes
Is it a fault to be in the wrong lane on a roundabout?
Not in itself. What gets marked is changing lane once you are on the roundabout, because that cuts across a driver who was entitled to assume you would hold your line. If you find yourself in the wrong lane, take the exit that lane serves and correct it on the road afterwards.
Which lane do I use to go straight ahead?
Follow the painted arrows first. Where there are none, the left lane is normally correct for straight ahead, but that is a convention rather than a rule and the markings override it every time. If the left lane arrow points left only, going straight ahead from it is a fault.
When should I signal left on a roundabout?
After you have passed the exit before the one you want. Signalling earlier than that tells a driver waiting at the previous exit that you are leaving, and that is the sequence that causes real collisions rather than just marks.
Why is Charlie Brown's Roundabout so difficult?
The junction itself is not exceptional. The approaches are. Traffic is fast, the signs arrive while you are still deciding, and the carriageway arrows are the last confirmation rather than the first instruction. Anyone still looking for a sign at the stop line has left the decision too late.
Do I have to give way to cyclists on a roundabout?
Rule 186 says you should give priority to cyclists on the roundabout, and notes that they will be travelling more slowly than motorised traffic. Cyclists often hold the outside of the circle even when leaving by a later exit, so do not assume a cyclist on your left is exiting.
A mock test on the Wanstead routes will tell you within forty minutes whether your lane choice is genuinely settled or whether it only works when nobody is watching.
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Published 1 September 2026. Prices and DVSA figures are checked when this page is revised. If anything here has changed, ring us and we will confirm it.