If you are working out your allowable expenses your your premises ( working from home)
I would be claiming for 1/7th ( based on rooms.)
I do not use this room all the time ( other family members use it also) so would allow 95% time to me and my work- OR the number of hours I work in a year.
What I am unclear about is this: if I base my figures on number of hours in a year, do I assume the room would be in use for 24 hours, or factor in hours when we wouldbe sleeping- so the room could notbe used more than say 16 hours in any day?
Would it be best to do the calculations based on 95% of 1/7th, or 95% of a number of hours that people could use the room - reasonably.