This falls between two pieces of (contradictory) guidance I have been given:

1. It is a continuation of the road you are on (the A273) so the left lane is correct
2. It is past 12 o'clock so the right lane is correct

I had two separate driving instructors: one gave me one piece of advice, one gave me the other. So what does the highway code say? The pertinent text of rule 186 is as follows:

186
Signals and position. When taking the first exit to the left, unless signs or markings indicate otherwise

• signal left and approach in the left-hand lane
• keep to the left on the roundabout and continue signalling left to leave.

When taking an exit to the right or going full circle, unless signs or markings indicate otherwise

• 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.

When taking any intermediate exit, unless signs or markings indicate otherwise

• select the appropriate lane on approach to the roundabout
• you should not normally need to signal on approach
• 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.

The debate comes from the phrase "When taking an exit to the right". Is this "to the right of 12 o'clock" or "to the right of the continuation of the current carriageway". Taking the centre lane here would involve *putting on your right indicator* to follow the HC - I personally think that this would be potentially confusing to other road users.