Tired of waiting 13 hours for British Gas to return your call when it was -9degC overnight and -6degC all day and trying everything to stop your water pipes freezing and bursting? I did this at 9 o'clock tonight and it worked! Lovely, lovely warmth. It was a frozen condensate pipe problem. We're at 1000 feet above Sheffield y'know. Good luck to all you freezing down there. Hope there's lots of gas during this cold spell!