In your picture example, there's no reason at all that as you try to leave the roundabout anyone should be in your way. Do you have another example at all?

>>3334
Not OP, but what if that blue car is turning left simultaneously?

>>3335
They won't be, the OP will be indicating that they are leaving the roundabout and they will be waiting for them to leave.

>>3335
You honk your horn and shout a two syllable insult at them. Dickhead and Knobhead are very good in this regard. Knobchops may work if you fancy something different.

If there isn't a sufficient gap, just indicate right and go around again.

>>3335
Remember the 3 A's

In this example the left lane is for taking the first exit, so if you want to take the 3rd exit you switch into the left hand lane in the hatched section as the people at this exit will be giving way to you and the left hand lane will be clear because everyone who was in it has now turned left.

>>3333
this

>>3335
you wouldn't be in that lane if you were taking that exist. Also you're aproaching from his right so he has to give way to you.