Right I am not sure but I may have found a theme. Climate worked today after I pulled the cabin filter (which was filthy btw- so thanks for the tip there), I drove 20 miles to Aberdeen, everything was great then I reversed into the parking space and the flaps closed again, only blowing hot air. Switch engine off, come back after 30 minutes and its working again. It's just done the same thing again.
So, the only thing that's new is a reversing camera that was pre-programmed from Ali Baba and fitted thanks to Sasha's excellent instructions, although it has worked brilliantly for a year or so now, I wonder if that is the culprit somehow, maybe sending a rogue signal when reverse is applied.... Trouble is, I can't unplug it without the rear handle stopping working as it's integrated 😞... The saga continues...