Thanks Zimba, i read the below on another site which has confused me...
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Which Sources of Income Cannot Be Combined to Satisfy the Partner & Family Visa Financial Requirement?
Income from Categories A and B cannot be combined with each other. So, if you and your partner are both in employment in the UK, you can only combine your income if you both fall under Category A or you both fall under Category B.
As stated above, there is an exception to combining Category B income with cash savings. Specifically, at stage 2 of Category B, where the income which you have actually earned over the last 12 months is assessed, you cannot rely on cash savings.
Finally, cash savings cannot be combined with self-employment income, or with income from employment as a director or employee of a specified limited company in the UK, under either Category F or G.
Thanks