My rear axle has been leaking oil since I got it a few months ago, had other more pressing matters to attend to on her first though.
I did replace the plastic cap on the end, the other one had marks on it.

I checked the breather house, not blocked.

Today I replaced the half shaft gasket, but after a drive it leaked again!

I checked the breather coupling that the hose connects to, removed it, totally blocked, OK I know this now, should have checked that first!