Another quick update on CV joints/axle replacement. The side of the car where most of the oil/grease was sprayed around the gearbox, I spotted there was no cap on the centre of the drive flange and it looked 'reet mucky' as a friend from Leeds would say. I'll have to clean it up and investigate further later today but a quick google shows I probably need to replace this, the circlip and a seal as well?
Good side (right)
Bad side (left):