Hi Scott
Long story short
I bought the car a few weeks ago from a lad who's Dad (the owner) had passed away in the January. Whilst he had the car, the ABS light had come on so he decided to investigate as he was wondering what to do with the car. there was a nice long thread on the &% forum about it. The guy is quite switched on and following advice from the forum, he used a voltmeter to get readings to see which one wasn't correct and it was the old favourite of o/s/r that was giving the spurious reading.
He traced it to that wheel only, I've spoken to a couple of people he say it is the same problem and reading threads, the symptoms are common for this type of fault i.e. the car starts with no fault, first gentle braking gives a "grind" on the pedal. ABS light comes on, braking reverts to normal straight away with no further grinding. The back of the car is a bit dirty underneath, there is corrosion on the back box etc, so I would suspect there is some rubbish dropped from the bake plates to the bearing.
Steve has sent me a guide, I may give it a go this weekend or leave it for the meet, not sure. It seems a simple enough job as long as the plate isn't destroyed. A couple of hours under the car the day before a holiday, what could possibly go wrong....