At any conference or exhibition, it tends to be the ad libs and asides, the departures from the scripted or official lines, which are the most telling. In mid-February, ITS-UK's Road User Charging Interest Group met in London. The event was no exception to that statement. Keith Mortimer, the Group's chairman, and his colleagues put together one of the better programmes on charging and tolling that I've seen in recent years. Sadly, however, the very positive presentations on deployments and technological pro