The smoke apparently is formed by having diesel go onto the exhaust of the plane and it burns off there to form the smoke. There is a third member to this team and at one stage two of the planes made a heart with the smoke and the third plane made the arrow through the heart. Super, even in the wind.
I think this was called a mirrored flyby. These guys were outstanding.
The South African Airforce had a couple of aircraft taking part. This big boy first did a display on how they use the bucket under the helicopter to drop water on a fire. It then dropped the bucket off and put the helicopter through its paces. Amazing what such a big helicopter can do with a skilled pilot behind the "wheel".