Whilst it's true that at this stage as the flat is in your name, you don't need his signature to sell it, I would expect that if you did market it to be sold he would register a home rights charge as your spouse and this would prevent a sale going through.
This home rights charge is used to prevent the sale of an asset in a marriage break up before the court has decided if he should have any share in the asset.
It's also very difficult to evict a spouse from the family home.
The route to have someone excluded your home is via an occupation order, particularly given that you are a victim of domestic abuse.
As to the sale, I suggest that you apply for divorce and deal with this through the financial order application.
Hopefully this will assist you in finding a way through to a resolution.
Thank you again for visiting JustAnswer, please do let me know if you have any additional questions in the future. I am also happy to answer any new questions on other topics that you may have, you can request me by putting “for PLCLEGAL” at the start of the new thread. Best wishes, Peter