Hi, I was stopped by a marked car whilst travelling at 69mph through a 50 limit in roadworks on a motorway late last week. I was issued with a FPN and was intending to take the fine and points and be done with it but having looked at the ticket carefully the officer has written the offence as "Exceed 70mph" (Presumably this guy spends all day pulling people on the motorway and wasn't thinking) . Now considering that he has no evidence of me exceeding 70 what are my chances of getting this thrown out and what is the best way to go about it?