Heathrow delays are not so prevelant today with BA and other airlines clearing backlog.  At present temperature is -3, so it is icy on the small roads.  If driving to Heathrow, take care as there is a lot of ice about.  The snow settled on the ground seems to be freezing, but it does not seem that cold.  Inside the Cottage Guest House I think we are a bit too hot even.  I still would not like to spend all day outside.