Luckily i dont use my car much, but just noticed its got a small patch of oil under the car which seems to have run down the sump.

First thought is where is the turbo? I hope its not that leaking!

Next thought, is where else should i be looking? I was in my work stuff before so wasnt gonna go climbing underneath it and getting my shirt all dirty!

First thing to do is take the plastic cover off the top of the engine and look for leaks around the rocker cover, hoses and whatever else you can see from above. If you can't see anything then I'd get it on a ramp so you can look underneath it.