In my opinion, and not legal advice ! : Say your piece and offer your evidence. I was booked for speeding with a Speed Gun, and in court they said a speed that was 1mph more than the speed shown to me on the device at the time. It irritated me for years, maybe 5-6 years of arguing the injustice of it in my head - over 1 mph ! If you genuinely think you are in the right then get it off your chest in court otherwise it will do your head in !