When my wife stated her defence the prosecuting Garda sergeant said, under oath, "We don't use that American GPS we have our own GPS!". My wife though she had him at that point, but the judge believed the Garda.
I have kept all the documentation in case we can do something about it in the future, but that's unlikely. What is really grating is that the lady before my wife admitted to doing 120kph in an 80kph zone, the judge dismissed the case because of her "honesty and frankness".
Currently An Garda Siochana (Irish police) is undergoing huge turmoil and a number of public inquiries due to corruption and bad management. When the police are found to have faked 1 million breath tests in order to hit targets our little issue becomes very low hanging fruit.