Our electricity is ~£50 a month
Gas ~£40 a month
Showers are heated by the gas, so is the heating. Cooking is all electric. Plus, at least one pc on 24/7. Sometimes 3 on.
Rarely use the heating though, only for a few hours max in the evening. My PC keeps my office warm enough.
Might wanna check the temps mate, must be high if they are keeping your office warm
