I might have sorted the issue out, i had a dualband router directly over the box not sitting on it but pretty close, (which as I think about it I might have put there around the same time I flashed the image after a few months of not updating) I moved it this evening, only 1/2 meter to the side and hey presto the gui is working 10 times better, not getting any freezes, where as before it would freeze while just watching a program, I can now traverse the menu and play recordings without an issue , I might be a bit premature in saying it has sorted the problem but fingers Xed is it possible the wifi was/is effecting it?