Jetsam,
Global warming does not mean increased temperatures, it means climate change. For the UK the predictions are colder winters and more rain in the summer.
Sounds like the met office are spot on. Why are you blaming them for your / another companies failure to plan for cold weather?
On another note I see BA have finally managed to persuade HAL to allow remote deicing. It only took twenty years!!! They seem to have a plentiful supply of both de and anti-ice judging by the quantities they're using per a/c!
LD