Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first
What makes you believe that the funds still exist and have not been spent?
Did you live together?
Do you have access to his paperwork?
Have you now got Power of Attorney to deal with his affairs?
In that case you can use the service here
Please bear in mind however that there may be no account to find
Please ask if you need further details
Do you know where the former matrimonial home was?
You do not know where he went next?