Tortoise beetle Cassida vibex

I found this little beauty this afternoon while poking around in the wet grass looking for Brassica bugs!
It is a little beetle of the family Cassida or tortoise beetles so called for obvious reasons.
I have found several species of tortoise beetles over the years but this is the first time I have seen this one.
I think he is quite smart in his irridescent green shell, and quite well protected when he 'clamps' down onto a leaf.
Enjoy.....