I take it you are new to the UK and haven't a clue as to what a typical UK winter is like? Read up on any description of a UK winter and this is it, albeit it's very wet at the moment.
Reached 10.9 here today which occurs every winter many times over.
Don't know whether you are constantly on the wind up or whether you really are 'shocked' at 11C in a UK winter? You should have been in the country over the last 20 winters with hardly a frost all winter, never mind snow. This winter, so far, is nowhere near bottom of the pile. You are in for major disappointed should you remain here and keep your current expectations.