[kaivalagi]

Lots of roundabouts have either left or right lane for straight on with a merge on the exit, I often take the right hand lane as most car drivers tend to stay in the queue on the left, then give it some gas and make damn sure on exit I am leaving the roundabout with no-one else beside me.

Unless the roundabout you're taking about had a right only arrow painted on the ride hand lane entry into it?