Well tbf, even though it may not be a common thing, you can get junctions where you could turn left/straight/right in the inside lane but only turn right in the outside lane. But generally speaking you're right, you wouldnt get this on roundabouts, but people were doing it anyway. Lets hope in the future when it does get all changed they put up plenty of signs warning the dopey ****s about thoughRidiculous decision, goes against the rule of roundabouts.