Roganval,
I have a 2009 plus4 and it has a limited slip diff --- Has yours??
I had a similar "clunk" when parking / moving off which I assumed was sticking brakes and I endured a 7 month saga chasing brake issues -- to make a long story short it was the Limited slip diff and the issue was the wrong oil in it which meant that it was sticking when the oil got warm.
See
http://www.talkmorgan.com/ubbthreads.php/topics/87162/1The solution is to drain the diff and put 70ml of Friction Modifiers in the diff and then fill it with Castrol Syntrax 70-140 Limited slip diff oil. I was given this spec by the factory. They use a Millers oil which I cannot get here in Ireland.
I hope(in a way) that this is your problem too so you can obtain silence!! I am now delighted to be able to park my car without people thinking I don't maintain it properly!!!
Cheers!
