Since coach drivers rely heavily on tips to augment their basic wages, the comfort of their passengers is of great importance to them. There is also a significant safety consideration, in that the windscreen of a cold coach would become misted-up as soon as the passengers embarked.
For these reasons, and despite my personal concern for the environment, it has always been my practice to run the engine of my coach for 20 minutes or so before the passengers embark.
Rustington, West Sussex
12 SeptemberReuse content