You need to get a copy of your credit reports from www.experian.co.uk and www.equifax.co.uk
From here, you will see any credit that is out in your name. If you have any credit taken out that is in your name but not taken out with your permission, you will need to get in touch with the loan compnay (details will be on the report).
You need to file a "notice of disassocaition" with the credit reference agencies. - this means that your husband's credit will no longer be associated with your own.
You will also probably need to contact the police and report your husband for fraud if he has taken out any loans without your permission.
If you have moved out / away, make sure that you have the post forwarded by royal mail. That way if any letters from any loan ompnaies come to you, you will obviously have them.
Hope this helps, and post back if you need any further info.