Signalling on roundabouts is easy, when you know the rules.
But here are some tips before you start.
Remember you must give way to any vehicles already on the roundabout before you enter. And if the lanes approaching the roundabout are marked with arrows, make sure you follow their direction.
Otherwise, if you're planning to turn left, here's the way to do it.
Approach the roundabout in the left lane or line of traffic. Then, signal left as you approach the roundabout. Continue to signal left as you exit the roundabout and turn your indicator off after you've exited.
If you want to drive straight ahead on a roundabout, you can approach without signalling. But, make sure you signal left as you exit and turn your indicator off after you've left the roundabout.
To make a right turn, approach the roundabout in the right lane or line of traffic, then signal right as you approach the roundabout and continue to signal right until you're ready to exit. Then, signal left before you exit the roundabout. The same rule applies if you intend driving beyond the right turn exit.
Signalling on roundabouts is simple, when you know the rules.