Didn't the trial judge point out that had the Transport Police provided CCTV evidence, then the lady would either have been exonerated, or the "flashing judge" cleared beyond doubt?
Unfortunately the footage was never provided. I wonder what happened to it...
PS. Apparently part of the defence was a pair of Calvins that require two-handed operation for *ahem* exposure purposes, and the lady said it was all done with one hand. Not quite sure how either the accused could remember what pants he was wearing on a particular day, or how he could prove (if it was his contention) that he only ever war that type.