OK guys as Jack suggested have started a second thread, regarding the battery light. Car came back from machanic last night with new belt fitted, whilst this has improved the situtation the light is still coming on. My machanic ( he is a good guy ) thinks that there is nothing wrong with the alternator however he believes the problem may lie with the alternator clutch which he thinks is overrunning. His reason is the visable movement and vibration in the clutch at both high and low revs. Has anyone see this and any comments on the diagnostics. As he is going to change clutch may as well go for an alternator at the same time ?