I'd remove them if I were you. If you get pulled over by the same policeman you're only going to get fined again, plus more than likely you'll either be asked to remove them at the side of the road or be given a rectification notice. This means that you have to take into a garage and pay someone to remove them as you have to get the paperwork stamped to take to the police station inj order to prove it's been done.
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