After all this...I finaly got the car onto a ramp (was having the tyres changed) and managed to check what the noise was.
Surprise surprise.......it was the centre exhaust bracket. The garage that services it must have tried to fix it by putting a jubilee clip round the exhaust and the tightening it round the broken bracket. It was this clip that had come free and was now sliding around on my exhaust, and rattling like mad!
I got the guy to rip it off, and will try to get the broken bracket welded again when I go back for the two rear tyres next month.
Was surprised to see that the original exhaust still looks in very good shape having covered 103k+ miles! I was waiting for it to fail before going for a Milltek, but looks like I might be waiting a long time for that one!
Cheers for all the help anyway guys.
