Volcanoes

Oops.  There's been a huge eruption in Iceland and now there's a cloud of smoke and ash so big that all the flights out of the UK have been cancelled.

Or that's what they're saying.  It's abundantly clear that the Icelanders have done this to get back at Europeans trying to make them repay debts built up in the 2008 crash.  They're just trying to punish us by turning the sky black.