On extended leave but just got the BBC Ent (Polish) a full report of this incident. Old ground too but it does seem to be a case of blocked pitot tubes caused by supercooled water droplets. This was after a careful study of the meteorological conditions at the time. Looks like the crew were faced with a number of confusing indications. I have to say, at great risk on the PPrune pages, that 'Flight with unreliable airspeed indications' is a regularly practiced exercise in my present company. Another fave is to leave the seat, pretend to be in the forward loo, return (after closing your eyes) to find Handling pilot confused with a series of events. Sort it out as a crew. Most agree, good value & that was the point of my earlier offering. Return to the Flt-Deck and face something that needs to be corrected, quickly. That is what the Trainer did on my mate's Line Training even though it provoked much heated debate, later.