I thought it was to do with the squadron having been planned to go to the far east to finish off the war there, until 'the bomb' was dropped, 'Tiger Force'.
Alan Cooper in his book on 35 Squadron says that 'the 16 aircraft detailed for Goodwill were painted white and black and wore the squadron badge'. The colours were already there in earlier pictures (as you can see in my first post) but the badge was added, on both sides of the cockpit, just before their departure for the U.S..