a) Past GBG is a cretin and b) the flat is generally pretty warm so though it would be OK but without taking into account c) which is the temperature has dropped to arctic, as i would have known if i'd checked the weather forecast. #fail
I did a similar thing here, we had the heating on a good majority of Sunday, so in a money saving frame of mind switched it off - but forgot to switch it back on so it could come on at the selected times, hence house was Baltic last night!