Gearbox oil leak

[M400UK]

Hi, just noticed that I've an gearbox oil leak, seems to be coming out of the left side where the shaft goes into the gearbox and there are some traces of it on the otherside where the longer shaft enters the gearbox. Can't be the filling or oil level plugs as I checked these and they are both tight. Been driving perfect and she still does but noticed it when I lifted clam, looks recent. Has anyone else had this problem or know what it could be?

[sportsandclassic]

sounds like the drive shaft oil seals are leaking.

[M400UK]

It was, I replaced them with parts from local ford dealer.