I have an old and battered mk 1 Jazz. For several months there has been a fairly loud clunking or banging noise coming from under the car when I drive on rough roads. It drives and handles perfectly, the tyre wear is even, I have crawled underneath it and can find nothing loose, removed the wheels and checked evrything it sight and a few things I cant see, Last night I drove over speed humps at 25 mph, no noise, no problems, as soon as I hit an uneven road surface its back again. No noise on a smooth road surface, but the much patched road I live on makes it sound like someone is underneath hitting it with a mallet. Does anyone have any ideas ? ( aside from buying another car )