What a great shape it has, Jack.
The following I got by sitting next to blooms this afternoon. If I can't chase them then they might join me. It is on an Australian Buttercup.
This is a Blue. They are small and I have pawed over the butterfly books but it is too hard for me to get to a species level.
The following is accidental but gives an impression of the upperparts.
PS After looking at more photos, it is probably Common Grass Blue - Zizina labradus.
