A quick feature was just on TV3 within the last 5 minutes with regard to this. It was officially confirmed that a Marchetti was on CAP, with orders to shoot down any aircraft that were a threat.
The report mentioned the Air Corps have no capability to shoot down, let alone investigate any jet aircraft who were a threat. And went on to say the RAF would have to be brought in for this.
There were quick glimpses of a pilot strapping into a Fouga and the cockpit of the Casa (I think)
.....