Hello,
I am currently going through a Court Case for financial separation due to divorce. My ex just left the marriage end of 2018 from one day to the other leaving the country as well, leaving me completely on my own with our 7 year old son in London, hardly paying any child maintenance (a lousy £152 per month which is not even a third of the costs I incur for my son) and stopping all his financial responsibilities towards the flat.
When he left, I was on fairly low income and struggling with everything, financially, emotionally and caring for my son.
We have a 50/50 share in common property and because I worked extremely hard during the last two years I managed to get a much better paid job and I am earning now double of his current income, because he let himself go, lost his well paid job and is now working on low pay.
Now that I earn more than him - he wants it all, making demands like £35k more than the current value of his share... he is arguing that back then his father lent us the money for the deposit and he paid back in monthly installments , completely ignoring the fact that 25K of my inheritance went into the furniture, flat repairs, children, support of him when he was without a job during the last months of our marriage.... that I worked part-time and backed down on my career development to look after our son etc.
In my opinion we are quits, and I can just about to afford to remortgage for the value of the flat, but not his greedy demands on top. He is basically more interested to cash in on the flat than making sure that my son can keep his home and has stability and continuity.
I will present my reasonings to the Court, but I am concerned that they will not decide in my favour. They made a sneaky remark at the last session aka now that I am earning more than my husband, I can be happy if they do not order me to pay spouse maintenance for him... which I find unbelievable, given all the struggle I had to go through and carrying all the burdon of bringing up a child alone now.... 
I just wonder if anyone has experience with this - I am hoping the judge will show some fairness and humanity and look at my son's best interest and not at my ex's best interest....