Having just read the previous comments, I'd agree with Veronica's point of you saying 'I believe' and that leads on to your final comment:
I do know that the bank had an agreement with my Auntie and possibly my sister to keep the hotel working until sold. The hotel was the heart of the business and would certainly have covered my mortgages. I have never been in contact with anyone since I walked away.
How do you know the bank had an agreement with your aunt and sister? If they were to take over anything then I'd have thought you would have to sign something legal to confirm this rather than it just being some form of verbal agreement?
Also, and correct me if I'm wrong, if you walked away and haven't been in contact with anyone since, to me that indicates there is bad blood between you and the remaining family and if this is correct, how can you be sure all debts are paid, were letters addressed to you opened or binned, etc, if it's all in your name? If I were in your position, despite it being 'several years ago', I'd be inclined to contact the banks or mortgage company directly and ask them for a full overview of what happened to the status of the account from the time you walked away, after all, if they were in your name, you should be entitled to this information.
Saying that though, you'll just have to hope you don't have a black mark against your name and you now calling them could actually result in them saying they've been trying to contact you for x no. of years due to non payment and you owe £000's...?