Hi Paul. Thanks for that. I've not used a vacuum kit. I lent my trusty Eezibleed kit out a while back and never saw it again. Can't bring myself to buy another. But I did pick this up:
http://www.halfords.com/workshop-too...h-bleeding-kit
It's pretty good TBH. Bled the brakes in a sort of Z formation (if seen from above) starting with NSF and ending in OSR if that makes sense. Firmed the pedal up a good amount. I think I will repeat this tomorrow, flushing the old fluid out as I go.
What's puzzling me now is the NSF wheel still gets like warm to the touch after a drive. But it's brakes aren't dragging. I've had all the wheels spinning off the ground, and they're all as free as each other.
I wonder if a warm bearing could cause this, -nod not have been flagged up at MOT, nor have any other symptoms...