When going straight ahead at a roundabout, when should you indicate left?

Indicating left after passing the exit before the one you will take is correct because it provides clear communication to other road users about your intention to leave the roundabout. It is important to signal your direction when you are about to exit to ensure that other drivers and cyclists are aware that you are moving off, which enhances safety and reduces the chance of misunderstandings.

Signaling at this point also helps to maintain the flow of traffic by alerting those who might be approaching the roundabout or other vehicles already within it. This action is consistent with road safety norms and ensures that everyone on the road is informed of your actions, which is crucial in a dynamic environment like a roundabout.