UPDATE:
Yesterday I received this months' bank statement - with ?100 in charges for letting my bank account get overdrawn!
That little notification arrived quicker than the 'form' they were sending me three weeks ago so I could apply for my money back; the money the bank allowed to be stolen from my account.
I phoned Customer Service and explained what had happened (you're right, Malc, there's going to be a lot of irate phone calls!) and while the guy was waffling about how it wasn't his department, I told him I didn't want him to do anything but tell me the address of the Ombudsman so I could get them to deal with this. With that, he said he would deal with it now, he'd take off the charges, make sure that if I got overdrawn anytime during the rest of the year, charges would be waived, and he'd chase up the missing form!
I'll take a little trip to the bank later today and see if this has been done!