That's what we'd expect from a la La Niņa year anyway. After all all it is a cool current flowing up from the South pole, which has dramatic implications for the planets weather systems. That said though there may be other factors at play such as decreasing solar flares and so on. Needless to say I wouldn't make any more of a judgement over this than I would several years of heating. It's interesting atm, but that's about all you can say I think.
Something like this.
As you can see the prevalent conditions over the gulf stream are warm, thus England is warm. It's what they predicted anyway, they said this last year.
It's not so much of a mystery in this case, again anecdotal and pretty simply explained.