Ok. So after a whole heap of cursing I managed to get the oil filter housing undone. Damn it was on there tight!

So the oil and filter have been changed. On start up, no oil light. Good sign! The mrs took the car down the street, no oil light! I get into the car to go get some smokes, OIL LIGHT! GRRRRRRR
I turned the engine off, counted to 5 and turned it back on, no oil light.

Some thing odd is going on here, whether its a fault with the sender, the light. Not sure. I think I'll book it in to get looked to make sure nothing serious is join on.