I have a small leak from the pipe leading to a radiator. Contacted British Gas online as have a contract but first available appointment is 6th January. I've put a dish under the leak that I'm emptying everyday. However I'm starting to worry that my combi boiler might lose pressure and I won't be able to fix that myself. I really don't want to lose my heating and hot water over Xmas. Should I just bite the bullet and call someone else out now or will it be ok to leave until the 6th?