We're a bit further North and I was definitely feeling the cold when working from home doing office work in December. I find down to about 12 or 13 I don't really feel it, but there were times my "Home Office" (aka spare bedroom) was down to 8 or 9. Oil tank is reading around 750L at the moment, I'm hesitating about the right time to get 1000L in. We used a lot less oil this season, but with hindsight should have probably had the heating on earlier in the Autumn, not just the cold but the whole house was feeling clammy... the big Scottish house is only 9 degs. Local logs keep sitting room warm and oil gets turned on 4 hours a night only upstairs when going to bed. What a strange world we now live in.