Who's driving CFA?
It's not Sue Folks, by April 1971 she and Max, and Alex McDonald were running another company.
I note that the small, metal chocks are in place at the nosewheel, so the aeroplane isn't going anywhere soon. It was common practice to warm the engines, then do the ignition and feather checks before taxying around to the front of the terminal to pick up the punters.
Or, it could be one of the engineers doing a ground run, so perhaps it's one of these chaps - John Parks, Ray Wild, George Jones, Terry Reid, Brian Payne, Peter Hutch, Mick O'Mullane, George blah the Irishman, Lindsay Harbord, Louie Peak, Reg Tutt, Bill Keenan, 2 guys in the propshop, Keith Bergraff and Roger someone, Richard Shorter, Ray Dickenson.
As a matter of interest, probably to nobody, I flew both CFA and ECE in my early days.