I would advise against moving to Nationwide, they have a similar dismissive attitude to fraud. My account was scammed in June. I found out about it not from Nationwide, but from someone else who trades on the same auction site encouraging people to check their accounts after finding problems with her. I phoned the customer service number who gave me a number for the fraud department, who refused to speak to me because I had come through on the "wrong" line and refered me back to the call centre. Three hours and many phone calls later I tried the police, they told me that they only took an interest in things when they were reffered by the bank. When I finally did get through to some-one in fraud they dismissed it as "clerical error" and wanted to know what the problem was as I had not lost any money, because it had been refunded. She overlooked the fact that the building society must have incurred some sort of loss; and that as a member I am therefore inconvenienced. Four months later they are still shuffling money in and out of my account as charges and credits for these direct debits.
The most worrying thing is that they do not seem to have any security checks when direct debits are set up, they just assume they are genuine untill told otherwise. No wonder the Country is in such a mess when we trust these total incompetants with our money!
Regarding CrazyCatDD's comment about Shabby employees not admitting or accepting any mistakes; that is standard practice in the finance sector it is ALWAYS the customer's fault. I have only ever had one place I was happy entirely happy with National & Provincial Building Society, in 5 years they made 1 error on my accounts, which they acknowledged and sent me a letter of apology. (That has only happened to me once in over 20 years of dealing with the arrogant incompetants, who seem to be prevalant in the finance industry).