The Royal Aero Club of Western Australia holds a 'Dawn Patrol' from their base at Jandakot Airport (Perth's Light Aircraft airport) on the weekend closest to the anniversary of the Battle of Britain. This year was the 64th anniversary. I went down this year, not in time for the flight (too early for me on a Saturday!), but in time to catch some images from the displays at the Club.
I believe Unidentified #2 is a PT19 Stearman, an American Army trainer of the late thirties and early war. The Navy used them too, but they were painted all yellow.