Deductible costs for CGT

Hi, I have recently sold a property I bought to live in with my ex-wife, and then rented out for a period afterwards. I have therefore calculated my PRR and deducted further costs such as solicitor fees, marketing fees etc. when calculating my taxable gain. However, during my ownership of the property I paid my ex-wife a sum to retain the property in my name only through a settlement agreement, i.e we initially joint owned the property when we both lived there, but latterly only I did due to payment of said sum - this is documented in a settlement agreement. Would this sum be deductible along with solicitor fees etc. given it is a direct cost in me keeping the property? Also, the property was upgraded with new windows during time of ownership - does this qualify as a deductible expense too? I can only see examples such as new bathroom / kitchens / extensions etc, but no mentions of upgraded windows. Advice on these two points much appreciated. Thanks

Hi taxman123,
The fees must have been incurred wholly & exclusively for the purposes of acquisition or disposal:
CG15250 - Expenditure: incidental costs of acquisition and disposal
So the cost of drawing up the settlement agreement would not be allowable.
Please see:
CG15180 - Expenditure: enhancement expenditure
For enhancement costs and what may be allowed. 
Thank you.