I have two bottles of RBF600 sat downstairs flush and change and bleed is happening next week, as well as checking the pads and pistons.
Discs aren't warped, definitely had warped discs once, I think due to rust on the mounting 'faces' (excuse me I can't remember the term), don't get any judder, nor wheel vibration at any speed.
As said, the calipers I think are the original UK ones. The caliper refurb kits appear to be £48 from Toyota, I didn't know Chris did a set. How long does a refurb take? As whilst I can put the car up on a ramp, I need to be able to do the job in a day.
Ah, I like Dunk, being part asian have small japanese esq hands (which is handy for those hard to reach places in the bay though)
Cheers for the advice all, please keep it coming, I will document what I did and what the root cause is so that maybe we can have a guide for what to check - as doesn't appear to be a definitive thread in tech.