One of the things we get used to on our country roads are Cars suddenly appearing behind you. Unless it is a big engine-as you have in the US, or being driven by an idiot- which most of us have- Then we do not hear cars behind us. Modern cars in general are too quiet. Only one thing for it and that is a mirror- which I do not use since it got knocked off by a car coming too close about 5 years ago.
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How long was I in the army? Five foot seven.
Spike Milligan