The test pilot was briefed not to use reheat(afterburner) on the ground.
I was part of the group of tankers that ferried 56 Sqn to Cyprus. We then ferried two to Bahrain where one was used by the demonstration pilot and flown to Saudi and back.
It certainly used afterburner to take off from Bahrain and I am sure that it would have had to use afterburner to get airborne on its demonstration flight.