Dozy,
Thanks for the useful gen on the Thales probes, and the conic plate mods.
Inconveniently, neither of the accidents you mention were caused by icing of a heated pitot probe, as Lyman and Turbine_D have pointed out.
LIke them, I wonder if the location of the probes needs to be reviewed, and if the slimmer nose of the A320 may be a factor. Also, I sometimes used to ponder, during my walkrounds, on the pros and cons of locating Pitots 1 & 2 at precisely symmetrically-opposite positions on the fuselage (Pitot 3 being the odd one out). Then I would remind myself that the same applied to the AoA probes. It seemed to me that this might be a recipe for (roughly) simultaneous ice accretion of numbers 1 & 2.
Can anyone cite an accident prior to AF447 that was related to the icing of a properly-heated pitot probe or AoA probe? Right now, I can't think of one, nor of a type that regularly experienced UAS problems in any flight-phase.
Happy New Year everyone and, for those who practise, safe landings!