Ended up bleeding another 500ML of fluid through - got no air but pedal seems better. Replaced front pads and went through a slow bed in process. Pedal is now better than it has ever been BUT.......
LHF caliper now leaking between the two halves!!!!!!!! Bloody LANDROVERS:mad:
Waiting for a new one coming from the UK! Have also ordered Stainless Steel PFTE brake lines.

