Having put up with serious steering wheel judder for last 6 weeks, particularly between 65-85mph, and after having new front wishbones fitted, I finally had the time to get the problem looked at, and hopefully shed some light to others.
It turned out after having all four wheels balanced, the front two wheels were buckled!! It was not noticeable to the eye, ie. no signs of serious kerbing, only when they were put on the balancing machine could you see how bad they were. Having paid out for two new ones.. hey presto! No judder at all!!
Next problem...when raining, the back passenger footwell has water coming in from what looks like the boot!! Argh!!