Police forces operate under their own policies in respect of providing evidence on request, but some constabularies will not release evidence unless the ticket is challenged by you pleading not guilty. If the alleged offence was captured by a police car rather than a speed camera it is likely that Provida in-car speed detection equipment was used to measure your speed and a video recorded of the alleged speeding. If you believe you are innocent of the charge then you may wish to pursue it and seek independent legal advice, but if found guilty then the punishment is likely to be higher than if you had plead guilty at the outset. You can read more about speeding fines and potential penalties in our guide here - www.honestjohn.co.uk/advice/driving-advice/speedin.../