Thank you for raising this Andrew, we are also on oil, with electricity supplied by Octopus, so the responses have been really useful. We have a large old granite building to heat, so it's been an expensive few months. Thank goodness it was a mild winter and spring! Thanks again, I'm away to create a spreadsheet to work out what proportion of those costs I can claim for tax purposes.
One question though, if our AirBnB is a portion of our main house, but separate, should we also take into account occupancy rates, or, just claim for a proportion of the bills for the entire year? Any thoughts?