hello all, I live in a 3 bed semi detached house that’s about 30 years old. 14 year old boiler but unvented cylinder in the loft. Heating goes on for about one hour in the morning and is turned off all day until we return home at 4pm it’s then set to around 19 and is off completely over night. What am I doing wrong? Bills seem to have increased since smart meter was installed last month. Is this extortionate of am I just out of touch with gas prices?