Rental Income and brough forward losses

Hi Folks,

Wonder if you can help or share experiences on the following :

Post divorce, I kept a rental property bought during the marriage. I do not currently have any income from employment, only from rental income.

1. Since my ex-wife knows about the rental property I expect her to ask the CSA for a variation for it to be included in the assessment and I assume they will definitely include it ...is this correct?

2. Also the rental property has tax losses brought forward from previous years, say £(20,000). So assuming this years rental income is £12,000 after expenses, what is the assessable income for the CSA calculation
1) rental income less expenses in current year only = £12,000
or
2) rental income in current year less losses brought forward = £nil (as £12,000 profit is reduced by losses brought forward)

appreciate the your help as the CSA have not been very useful

P