Hi,
As you have stated the rental business ceases when all activities giving rise to receipts from land and property ends.
You can claim expenses up until the last payment was received; for any expense to be allowable it has to meet the wholly and exclusively test.
See
PIM2068 for types of expense and we would refer you to
PIM3000 and
BIM9000 for post cessation expenses.
Council tax isn’t usually an allowable deduction when computing rental profits so please consider the above guidance.
Thankyou.