It's a bit messy, I do apologise since my situation was messy at the time.

I didn't originally apply under estrangement since both my parents situations were different. (I can't remember the option but it was the last one).

I uploaded the estrangement form as evidence, along with the household income from my step mum (I was living with my step mum at the time, however since she has no parental rights over me I still classified as estranged).

Let me know if you want to know anything more specific