They are responsible for IFR traffic OCTA.
But not for IFR separation. ATC's job is to make sure they are aware of each other, that's all. That's why it's called "Uncontrolled". From the Airservices website: "
Uncontrolled airspace has no supervision by air traffic control"
It's still your responsibility to ensure no prang happens.
No it's not. It's the pilot's responsibility in G. If those two had been VFR we wouldn't even be having this conversation. From the Airservices website: "
Uncontrolled airspace has no supervision by air traffic control"