Separating, advice pls.

Apologies...I wasn't clear.
House is worth 450k....mortgage left of 200k. I put in approx 60k and 20k from him. Bank reckons because of this I the equity would not be split.
Ok, by my simple calculations you’d need a mortgage of €305k - that’s if your husband is amenable to the split, but definitely worth re-engaging with mediator to discuss.

But maybe you’re going to have to figure out a way to exist in the same house for a while longer until a way is figured out