I see your point but surely our average winter is made up of predominantly west or south westerly winds? Hence given even a slightly near normal winter, a good bout of west or south westerly winds which we should expect in this country should deliver cooler than normal conditions because the Atlantic is cooler and our predominant wind is from this direction hence makes up a large contribution to our average temperatures. Certainly however, those winds *could* make it Walter than average still but I would of thought as the majority of our weather comes from the west (I.e ~80% plus), our average temperatures are based a lot on this. Then at the end of the day, average is all the extremes combined. I suppose achieving true average is pretty hard. Things are always changing and different variables at play all the time To differing extents. Makes it all interesting though!
Apologies if my post came across a bit sharp. I had a rubbish day yesterday.