
I've spoken to the garage I take it to for MOT and they have had several Fiestas with exactly the same issue. Haynes manual actually seems to think this is normal but I'm not so sure. Things I've tried are;
Bleeding the entire system.
Flush the system and replace with new fluid.
New front discs.
New rear shoes with copper-ease on the adjusters.
It improves for a little bit but then settles back to scary mode and the only place this thing leaves skid-marks is my underwear!

Anyone else had this? Anyone know of a fix? Fit a Focus master cylinder was one suggestion but would this work?