UK only please, would an "Absolute Discharge" show up in a CRB check?

I was alleged to have evaded my bus fare in London on a Bendy Bus, I had zero credit on my Oyster card, however I forgot I had zero credit, London buses (TFL) took me to court, I pleaded "Not Guilty" then a trial was set again I pleaded "Not Guilty" but I quoted paragraph 4 section 7 in my defence that the regulation states that I should have on request been allowed to have paid my fare for the journey I was taking. I made this request and TFL still took me to court, I used this section of the law against them and was given an "Absolute Discharge" by the Magistrate and was told to leave the court. Can someone explain what this means exactly in plain English! and whether this means I get a criminal record? Thank you.