I just took another call from a woman claiming to be Erika from BT, she said my BT internet connection had been compromised by a foreign operator in the last few days and she needed to run checks. I strung her along for a bit and then told her it was very strange because I don't have BT internet. She hung up. The number was 002032863610. Unfortunately I have heard of some folk being taken in and giving these people access to their computers. and financial details stolen. Best advice is just hang up, or like me you could have a bit of fun with them first !