What happened to Prince Phillip on this flight isn't related!
There was a policy early in the Queen's reign that she and Price Phillip did not fly in the same aircraft.
I believe this was because of Charles being a minor and the question of regency. How long this policy lasted I do not know and from the pictures above does not appeared to be strictly followed.
Also could Prince Phillip have already have started his round the world voyage in Britannia by this date?