busa's mentioned on Top Gear

[Pommie]

You usually find UK cops can and do use their disgression and can be spoken too and reasoned with providing the offense isn't putting others at risk. ie if your caught speeding and you and the cop are the only ones in the vicinity then I found a caution was generally the go, providing it wasn't ridiculously exceeding the speed limit. You could generally get away with 10-15 mph over