Gramaisc
Forum O. G.
Unless specifically excluded at whatever mini-roundabout you are considering, it is not illegal - however, the Highway Code suggests that you should avoid the practice.Is it lawful to go completely around a mini roundabout and head back in the direction from whence?
http://www.highwaycode.info/rule/188
There are places where it may even be advisable - attempting to turn right down Radford Bank from the private road at the top is not for the faint-hearted - better to go left and around the roundabout (carefully), allowing for the surprise that this may cause others...?