Nice one Chris:
Pre owned fully working genuine Nissan starter motors are in stock and good to go same/next day.
Just drop me a PM if I can help further.
Alex.
Hard to say from pix.
Could be drain or level plug washers, rear diff end cover, drive shaft seals.
Perhaps diff rear sub frame mount, but that would be goo instead of oil.
Clean it all down and check properly.
Thanks for the advice! I assume I will have to take the wheel off ideally to get at the dirt shield?
Correct: Wheel off to check the pads and dirt shield.