Hi, my " BATTERY NOT CHARGING " light comes on most times, I've had a new battery and alternator fitted but it still comes on, my mechanic has assured me the battery is charging although the warning light is still on, has anyone experienced this problem before or any tips on how to fix it?, many thanks Neil.

First thing to do is read the codes. If the battery is indeed not charging then that will upset the engine manangement and many other things. It could be there's a short to earth in the warning light circuit which will cause this. There could be a number of other reasons for it as well, i'd suggest searching for a local Jag independent specialist and/or a good autoelectrician.