Thanks for putting out the warning SueSocks, it's so important that we share this sort of information, and try and prevent as many people as possible being drawn into this sort of scam.
I actually had a phone call the other day from a company that I've instructed to looking into whether I had PPI, they wanted me to confirm my date of birth and other personal information before they would hold a conversation with me. I pointed out, that although I had dealings with the company, there was no guarantee that my post hadn't been intercepted, and so I wasn't prepared to give this information on the phone. The lady I spoke to said, well I could do a part check, for example you give me the date and month, and I'll confirm the year. However, having seen the ad on TV where they show the woman chatting on the phone with a customer, she asks for the 1st and 3rd digit of their passcode and then says 'oh, sorry, that should have been the 2nd and 4th', thereby gaining ALL of the code, I decided that I wasn't prepared to do that either. In the end, I asked her what it was that she was actually calling about, and she said it was just to check that I'd received the papers I needed to sign!!! Why would they need my date of birth etc. to ask that? So I'm still wondering if it was actually a genuine call, but am glad that I was on the ball and didn't give away valuable information.
Be careful out there people, there are so many scams going on that you really do have to be aware ALL of the time.