I would be taking the left hand lane.
162. Signals and position, unless signs or markings indicate otherwise.
When taking the first exit
signal left and approach in the left-hand lane
keep to the left on the roundabout and continue signalling left to leave.
When taking any intermediate exit
do not signal on the approach to the roundabout
approach in the left-hand lane or centre lane on a three-lane road (on a two-lane road you may approach in the right-hand lane if the left-hand lane is blocked)
stay in this lane until you need to alter course to exit the roundabout
signal left after you have passed the exit before the one you want.
When taking the last exit or going full circle
signal right and approach in the right-hand lane
keep to the right on the roundabout until you need to change lanes to exit the roundabout
signal left after you have passed the exit before the one you want.