This morning's oil level was fine. I do wonder if the leaking injector could be the right answer. Perhaps something stuck in it and over a week it leaked. I guess it could have dripped into the cylinder and then past the rings.
I never turn off the diesel when away from the boat, perhaps I should? I turn off everything else.
Plan is for a precautionary oil change, switch off diesel when not using engine.
The engine runs very smoothly so I don't think there is a general issue with the injectors.
Cheers Graham