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I've only been on the M25 once (being a northerner like) so could someone explain to me how the variable speed changes work?
I only saw one change and it was right (literally 20 meters) in front of me I obviously didn't slam on my brakes so I was technically speeding when I went past the camera... Haven't had a letter through the post though so am I just lucky or is there more than the usual 10% allowed?
Ta