Chris, I don't know if it's any different on RHD, but wait, you also drive LHD. This is how I always do it, and with all the LED replacements, I did remove it more than I care to admit.
- fish out the blind or warning LED cover at the end of the switch row
- remove the screw behind
- remove the small panel between the air vents
- pull the steering wheel towards you
- remove the covers and the screws behind
- ease off the centre panel, clip on the left end
- remove the air vent/instrument panel shroud screws, including the one just revealed under the centre fascia
- remove the instrument panel shroud
That's all. I can remove any of the units then: LH, RH clock/trip just snap into place. You have to know how to unsnap them, sure, that's why I said it had to be easier to do it with full removal the first time around, but it can be done. You can even remove the centre warning light unit if you know where the screws are, but this is a bit more tricky.
Actually, I have pictures, too, at:
http://citroen.tramontana.co.hu/en/elec ... hd-display