Thanks for that. I definitely use turn signals when changing lane to overtake but indeed I don't necessarily do it when returning to the main lane because it is implicit. I am not supposed to drive on the opposite lane indifinetely once the overtake is complete and I am faster than the other car so no warning is needed.
Yeah, its a good habit to have anyways that you turn, you signal at least 3 seconds ahead of time, that way drivers around you can react. Predictability is king on the road.
