Nanny Moth still has Large White caterpillars eating her cabbages and it's now December. You're supposed to stop seeing them at the end of September, so they are now around two months later than they're supposed to be. Even the frosts last week don't seem to have put them off.
I have to say that they are very stinky though. I guess it's all the old cabbage leaves they're eating, but there seems to be a cloud of cabbage pong hanging over them, that hits you as soon as you get near them. They seem to be enjoying it though!