CY - thanks for the correction
, I knew that really - honest! I have gone back and edited my post to correct to avoid confusing the lovely lady! Excellent piccies, BTW.
Any ideas why our particular 'event' happened'? There would be no need for any excessive pack activity to warm the cabin, as the mix valve should just add more 'hot'? Could there have been an icing problem somewhere in the packs due to the extra pre-cooling?