Be glad when MrsF is virus free as we've both WFH this week - me just in case I caught it (I haven't). Certainly heating has been on and electricity. Even needed the fan heater for 10 minutes to warm the conservatory. Roll on going back to work (PS commute costs for me are negligible being on the bike).
I work from home full time now, and Electricity is generally a bit lower during the week than the weekend, the laptop and monitors don't use that much power.
Heating hasn't been on during the day so far, we'll see how it goes during the colder winter months, last year I was running an electric radiator in the office but the new house is much warmer and even if I do have to run it it's a smaller room. Just been downstairs and the thermostat in the hall is set at 18° but shows it's 19° and that's the coldest part of the house, last night at 1am it was 17°.
For sure at the moment the cost of working from home is less than the cost of going to the office, even though I commute by bike. Just by virtue of the added cost of getting coffee/breakfast/lunch/snacks out most days.
