I am getting married next year. My husband to be still has

Hi i am getting married next year. My husband to be still has his ex wife named on their joint mortgage,despite having been divorced since 2006.The ex wife is also remarried,my question is,does she still have claim on the equity of the value in the former marital home,despite being remarried? Is she entitled to a share of what the value of the property was worth in 2006 or what it is worth now? The final consent order wasn't completed at the time of the decree absolute because she moved outside of the UK for 7 years and couldn't be contacted.I obviously need to know where we stand before we get married and combine our assets,I currently live in my own home at present.
JA: Was the home purchased during the marriage?
Customer: The home was purchased a year before the marriage came to and end,she subsequently stayed in the marital home for a year before leaving to go abroad.My partner then moved back into to property as he was still on the mortgage and partly responsible for the home,he then found that she hadnt been keeping up mortgage payments and had to clear £6k of arrears to be able to keep his home.
JA: Were any marital funds used for the mortgage or property improvements?
Customer: I dont think so,but can you just clarify for me "marital funds" thanks
JA: Is there anything else the Lawyer should know before I connect you? Rest assured that they'll be able to help you.
Customer: no i think ive covered everything