Can anyone identify these for me please?
I believe the black bug came in with veg from my allotment (in west london). The caterpillars were on the underside of a young broccoli plant leaf. I've never seen anythng like this before - all the others were single caterpillars from cabbage whites.
the bug looks like the third instar of the Southern Green Stink Bug (Nezara viridula)
The Green caterpillar looks like it's from the small cabbage white butterfly.
Looking at your link, I think the bug is probably the 4th instar - the yellow spots are smaller. I certainly have the adult bugs...
As for the caterpillar, I know it's from the cabbage white but I've never seen a "giant" caterpillar with baby ones seemingly coming out from under its body. The babies were all wriggling about. I say giant as it was huge compared to normal ones. I wanted to know what's going on.