Thanks for this, that's excellent advice! They only started receiving income after April this year so they are going to need to wait until after April 2017 anyway. Once they recieve their p60 then I guess it's just a case of plugging the numbers in from this as well as their taxable income from the rental?
I have had a quick look at the allowances and there is a fair amount that can be claimed. Maintainence and repairs but not furnishings etc I beleive.
As I understand it they will need to split it 50/50 processing a return each.