It is a fantastic shot. The thing that bothered me was how come Ireland escaped? They're cunningly hiding under some cloud, but you can see some of the land. The whole of Britain, top to bottom, east to west: totally white, apart from a greyishness for the major conurbations. Ireland: still green.

(Although the Republicans might not like the fact that Ulster appears to have stayed Loyal in this regard.)
I was wondering the same thing. Precipitation normally follows the opposite pattern, in my experience. :)