This may not be relevent to your problem because mine is a LHD model..not spec'd to the UK versions. Mine has a relay type thingy under the dashboard which splits all the lighting into Right side and Left side lighting...nothing to do with fuses and bulbs...if either relay fails, all the lighting on that side stops working.
Just to clarify...each side has its own relay gizmo. No help to you, but mine are situated on a little shelf under the steering column.
Dunno if this might help you...but I offer it in good faith.
The indicators are on the same circuit as the hazard lights, which are separate from the other systems...that's why they are all working.