Had a similar situation a quite a while ago with a UK loWW cost airline, flying from Scotland to the Midlands - aircraft had arrived OK, but supposedly a weather cancellation of the return. A quick check on the net for the METARs and TAFs at both departure and destination airports revealed that the weather was way above minima... Following my further request for an explanation backed by these facts, the airline suddenly became somewhat more forthcoming in helping me get home!
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