Fixed penalty are like speeding ticket i am sure that the law states that you cannot be convicted of something unless you plead guilty or be found guilty to an offence for which you are charged in court.
however i have found a few links to this site https://uk.answers.yahoo.com/question/index?qid=20100703110134AAN9WPC
and it says you will so probably
Build a bridge and move forward, Never look back except to see what mistakes you have made to learn the lesson for the future.
The future is what we dont know, the past is what we leave behind