Can get mine to go full flow on one side without the recirculating nonsense by going to dual, turning temp on one side of car to max cold and turning the other side of the car temp up above the point where it induces the recirculation and turn that sides vents off. Works on either side, helps a bit if its just you getting in to the hot car.
Got it regassed by dealer to rule that out and hopefully have some specialist knowledge applied at the same time. Was not to be ...they just said they had no idea, the recirc thing was not normal as they couldn't get it to cool and they'd like a further £75 to read the codes please. Going to try independent aircon specialist instead as dealer didnt inspire me with confidence that they had a real working knowledge of the system.