Thanks siftydog it was a bit of a fluke. I couldn't see too many eucalyptus trees so I thought I would widen the search a bit to within sort of Viscount range. Later did a bit of digging and think your snap probably shows Viscount A6-435 which was at Christchurch on 8th February 1967 collecting the Australian Prime Minister.
Here is one to go on with. I'll put another clue on this evening.
