Bled them again the other night. No need to pump anymore, yay, but it is still a little spongy and you can't heel-toe anymore.
Thanks Black32, I've driven it for 100km or so, so I'll have another go as soon as I can build up the motivation!
Any RB74s are squeak free! CRC Anti-Squeal Paste then bed in as instructed by Racebrakes and haven't heard a peep, hurrah! The ABS works too!