A quick, general answer is: no. While in uncontrolled airspace, you're the one responsible for avoiding any prohibited areas. Any ATC clearance is valid only in controlled airspace, as other airspace is totally out of ATC scope.
This is the case in Oz, too. Once a "control service" is terminated, the pilot resumes responsibility. Sometimes, if appropriate, we may issue a clearance to "leave and re-enter controlled airspace...".
If the aircraft is OCTA but still within radar coverage - and increasingly, ADSB coverage - we can provide an advisory service to assist pilots around Danger, Restricted and Prohibited areas, controlled airspace, VFR traffic, etc. It's up to the pilot to accept the advice - or not. They've always taken my advice.