Ice has been a problem for aircraft since the early days. More recently the B777 at Heathrow and now A/B330. Perhaps in this high technology world the basics are not treated with due reverence or simply that mother nature continues to teach us not to lose sight of the rules.
On exercise away from base a pitot had a heater problem which was a no go item, one was robbed from an aircraft undergoing maintenance and fitted in the evening. The main problem was the curing time for the sealant during October in Scotland.
Despite only circumstantial evidence pointing to the pitot system, the evidence has been building up and it should not need the threat of pilot action to accelerate at least a minimum update fit. The balance between costs and safety has always been a tight rope but once a reasonable amount of evidence is there the right action should be taken - the consequences are far more serious.