In November 1965, Ian Smith declared UDI in Rhodesia (as it was) and 29 Squadron Javelins were sent out to Ndola in Zambia to act as some sort of air defence. I was on Argosys at the time and we got involved in taking a mobile air defence radar system out there.
On the night of 08.08.66 I was in the circuit at RAF Khormaksar in Aden (I was a captain on 105 Squadron there) when we got involved in giving some navigation advice to a Javelin crew who were getting very short of fuel coming north from Ndola. I guess they were headed back to Akrotiri eventually.
One of my Air-Britain books gives XH762's last owners as 29 Squadron and it is given as Struck off Chrage on 19.04.68.
So perhaps XH762 was passing through Sharjah on the way back from Ndola?