I was recently stopped by an unmarked police car and accused of exceeding a temporary 40mph speed limit on a dual carriageway at 9.45am. I maintained 40mph throughout the road works and accelerated to about 60mph on the last stretch (about 100yds) of 40mph limit and carried on at 70mph. I was issued with a £60 fine three points on my licence, which I believe is too much, just for speeding the small distance. The officer said I can take this matter to court but he had recorded video as proof. On the notice he only mentioned exceeding speed limit as committed offence. Would I be successful at court?