Hi Coly. Sorry to hear that this got dumped on you.
I would suggest talking to a solicitor to see if that since you've been separated for so long if you are under no obligation for any debts that he may have. And as job has so wisely suggested, running a credit report is undoubtedly a good thing. You don't want to see that he has perhaps secured some personal debts against the house. Some people have a feeling of entitlement and forging signatures has been known to happen.
((Coly))
On BD H52, W50 T27, M26 S21, D23 BD-9-Mar-16 D-15-Jan-18 Final-19-Apr-18 I am a storyteller. The story may do you no good. But a story is never for the listener. It is always for the one who tells