I was in the same situation as you.I applied parent route in September but when we patched things up after separation my solicitor said l should inform the HO cause if they realise on there own it won't be good 4 me.So l had to get some evidence to back me up like letter from GP,health visitor and current letters to the adress l am in currently plus letter from hubby to explain everything.
We have been married for 2 n half years so l was told to also add letters to show l was in that adress before l moved out and any bills that am included e.g. council bill plus l had water bill though currently am not working though.
In the end l had to vary my application so filled in the form but not everything only the bits that show partner given that my application is already with HO.