Thanks fro the reply FL310.
I have done some more checking and discovered that it is not the fault of IE6 or my puter, it is a strange fault with my ISP.
Have checked with two locals using different ISP's and they have no trouble at all on the days that I experience this problem.
My help desk desk say they are aware of the fault and are trying to fix it. He gave me a reason but its too technical for me to understand.