Funny how things go around in cycles John, a few years ago we car buying public were encouraged to buy frugal diesel engine cars and manufacturers were encouraged to develop them. Mine has a 1.6ltr engine, it replaces the 2ltr one I had. The 1.6 is more powerful and produces more torque, and does more miles to each gallon of fuel than its predecessor, and when I stop in traffic so does the engine thus saving fuel and the environment and I am charged only £20 road tax for a year. But, I feel uneasy about its exhaust emissions that we now know to be so harmful. That is what can happen when politicians are allowed to make moral and ethical decisions they think are beneficial. They know best and we know nothing, and then continue to ignore the scientists who challenge the unreality of the stated beliefs of those same politicians.
Got absolutely nothing to do with Bantams of course, until that is, someone decides to analyse the muck that comes out of the end of an exhaust system? Funny how the officials get so sniffy about just noise, but ignore the potentially lethal cocktail of gases pouring out of a grid full of Bantam silencers, all of them running on leaded Avgas!