I spent a lot of time driving around the Borders. If I'm driving something slow and somebody appears behind me, I will flick a left indicator to show them its safe to pass. I'd hate to think I was holding somebody up.

The flip side to this is that in Scotland, a safe straight to overtake invariably has a speed camera on it. THE BASTARDS. So if theres no motorist co-operation, and you need to get past, its mighty difficult to do it 'legally' if not safely.