You must signal right as you approach and go around the roundabout, because taking the third exit counts as turning right (more than halfway around).

What you must do

For a standard UK-style driving theory question, “You’re approaching this roundabout and plan to take the third exit. What must you do?” typically expects:

  • Treat it as a right turn, because you are exiting after halfway around.
  • Signal right on approach and keep the right signal on while you stay in the roundabout.
  • Choose the right-hand lane if there is more than one lane and road markings do not say otherwise.
  • As you pass the exit just before the one you want, check mirrors and signal left to leave the roundabout.

In many multiple‑choice versions of this question, the marked correct single action is simply: “Indicate right.”

Mini walkthrough story

Imagine it’s a busy weekday morning and you’re approaching a single large roundabout with three exits plus the one you’re coming from. You check the advance sign and see that your destination is the third exit, so you prepare as if for a right turn.

You ease off the accelerator, select the correct gear, move into the right lane where marked, and switch on your right indicator well before the give-way line, timing it so other drivers clearly understand your intention. After you find a safe gap, you enter the roundabout, staying in the right lane with your right signal on.

As you pass the second exit, you check your mirrors, signal left, and gently steer towards the exit you want, watching for pedestrians in the crossing on the way out.