After replacing all disks and pads, the mighty derv got through. I'm sure its because I didnt take it for its 100 mile thrash to clean the disks up.
That will teach me to check the dates when its out of MOT!!!
One advisory, wear on the edge of the F/Nearside tyre.
Can live with that.
Well done Grimmy, I have bookmarked the caliper repair lot, just in case!!