Yesterday, the phone rang and the caller claimed to be from BT. He stated that I had been overcharged by a considerable amount for my line rental. He sounded genuine and said that calls might be recorded for training purposes etc. However, he then asked for my first name, which I thought a bit odd, and then for my date of birth. I then asked why he wanted that and he said it was for their records. Howerver, I didn't give it and , suspecting a scam, ended the call.