Advice for fair realitsic property settlement pls

Sodslaw10

Hi
Hoping for some advice
Purchased a house on my own many yrs ago, partner moved in -
18months later, 10 yrs after sold n moved and put any equity from the sale into this current property n doing it up,married a yr later n had a young child after a few more this house is still in my sole name we have recently spilt n he moved out maintaince has been sorted for dep and I am able to afford the property still on my own

I am trying to be fair but also look after mine n my child's interests who will remain with me

Although he has contributed to the h/h since moving In together he had no assets then and has none now, his employment is self emp but never official,

I have had numerous valuations done 1based on quick sale type ( which we would have had to do if I couldn't afford to continue ) and 2 other estate agent ones, am I correct on it being an average of the valuations, I have also worked out the average sold prices of the past 3 yrs property like for like,

There is a big difference on them between 46-£80k with o/s mortgage of £53k



Any advice on the fairest split considering all of the above, he will have no assets/income to provide any evidence ( although can earn what ever as self employed ) of where as I have and pensions etc

Thanks in advance for any guidance help or pointers on how I should proceed