Cool..I've been in one, but hadn't noticed the slats. I kinda assumed the tiger was the first for some reason.
Just looked it up. I reckon it's VH-UMK . Until this discussion I had no idea it was all wood. I was already a bit nervous about wooden wings, let alone the whole thing 😄
Still, was a great experience. My partner was in the Tiger Moth.
The same owner, Bill also has a Tiger Moth and a Leopard Moth, which apparently is exceedingly rare. I don't believe the Leopard Moth is flying though...
https://abpic.co.uk/pictures/registration/VH-UMK
If you look closely in these pics, there seems to be something under the top wings leading edge. Now I know, I would say that's part of the automatic retract mechanism for the slats?