Our holiday cottage has been closed to guests since March 2020 as a consequence of the Covid-19 pandemic. It's a gap of four months during which there's been no heating running and no other electric machinery or lights. The latest power bill has arrived showing no reduction in cost.
Back at the end of 2019 and through January 2020 we had a pair of guests stay who were heavy smokers who largely ignored the "no smoking" rule inside the cottage. The costs of remediating this are described elsewhere, but during their stay we had three occasions to visit the home during the stay. On each occasion we noticed the heating was on full blast but the windows and the back door was also wide open, even though it was the middle of winter. Their efforts to attempt to hide their smoking inside the cottage have cost us dearly in terms of additional power usage, in effect the equivalent to four month's worth of additional usage. Using the average cost per week of power (£14.77) this amounts to a figure in the region of £250.