Remortgage

sophlou95

Hi, I bought my house with my partner when I was 19. Years later we separated and i was left in the home with my child. 6 years on I now have a new partner 2 children we have outgrown the house are are keen to move. We have a good amount of equity in the home and my ex partner has agreed to walk away from the house for a small amount of money (we are on good terms, the original deposit for the house came from me and I have been paying the mortgage and maintaining the home without his financial support so he has agreed I keep the majority of the equity). 
Issue is my current partner has bad credit. I'm not sure he will be able get a mortgage and i don't want to be tied to his bad credit! Therefore moving wont be possible. I have looked in to remortgaging the house to release monies to pay my ex partner off and use the money for house renovations to make the space more livable. 
Due to my partners bad credit I dont think he will be able to remortgage with me taking my ex partner place on the mortgage and now I'm working part time due to young children i dont think they will allow me to be sole name once I have taken equity out. 
Is there anyway I can work around this. Can I remortgage alone with a guarantor? Can my mum remortgage with me? If I remortgage with my ex partner and keep him on the mortgage for a while and I am able to prove I am making the mortgage payments without him will they allow me to remove his name? 
Advice please! 

haras_n0sirrah

As a broker my first question would be how bad is bad?

sophlou95

He has a CCJ for a fine he didn't fight in court and has never had any finance etc to boost it.
I believe its on the poor side!