Unfortunately, we're unable to offer a advance on a shared ownership property. This is because the housing association which also owns part of the property usually has terms in their contract to be able to offer the property to their own database before it goes on the market openly, and has a part on the final approval on the buyer. 

If you have a shared ownership property and you 'staircase' (buy up the remaining portion to own 100% of the property) then you would be able use Nested.

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