You know Graham, when I was a child during 1940's & 50's we had snow and ice every winter and no central heating. When I woke up in the morning the windows had thick ice on the inside and my first job in the morning was to make the fire in the old black fireplace with newspaper and sticks and when this got burning I then put the coal on, it was great to start to feel the warmth. With regards to Steves comment about colds, I must confess I've only had flu once in my life also never had a cold for seventeen years, and I think the reason is because I was brought up to always dress accordingly.