At the end of the day, at least on the Broads, it could be the rich people who have to pay. There can be little doubt that far more stringent emissions testing on boats is long over due on the Broads. The 'gas guzzling', emission spewing craft perhaps most likely to fail any reasonable test are possibly if not probably the over engined, at least for Broads use, mega boats that are the demand of rich owners. Despite having regulations in place to restrict emissions the Authority has so far, apart from telling people not to run their engines at moorings, failed to tackle the problem with any great enthusiasm. I have been on the canals where the lock chambers can quickly fill with diesel emissions which quickly result in sore throats and smarting eyes, it is not just a Broads issue and I can foresee demands from other waterways, not just in England, triggering greater regulation.