The swing in winter and summer weather from 2009 and 2007 respectively is pretty remarkable, but I find the overall warmth from 1988-2007 (for winters) and the 90's and early-mid 00's (for summers) to be just as remarkable, and that came to an end fairly rapidly. We've yet to see a notably cool summer month according to the CET - in the bottom 10% of months, i.e. to be expected every 10 years for each month - despite plenty of near/below average ones, Perhaps the lack of summer sea ice is making that difficult, even if synoptics mean our months are still slightly chilly and rather wet?