Indicating at roundabouts

[Skyedriver]

Family discussion
Approaching a roundabout, lets say 10m diameter with one exit left and one straight ahead do you indicate right for straight ahead, then left after passing the exit on your left?
Similarly approaching same roundabout from the other direction and travelling straight ahead do you indicate left?
I know what I tend to do and what my son, currently under tuition does but another member of the family acts differently.

[Skyedriver]

Thanks everyone, pretty convincing argument there.
Need to discuss this with his Instructor.