Hi Mike562,
We cannot advise you which of the expenditures would be a capital allowance to set against the capital gain or a revenue expense to set against the rental income.
This is something that you will need to decide yourself, based on the guidance.
You will need to read the capital gains guidance to decide what is general repairs and maintenance and what is improving the value of the asset. CG15150 on expenditure and enhancing the value of the asset.
CG15150 - Expenditure: introduction
Thank you.