Little Illuminations: Who is the Lamb and who is the Knife?

I wanted to cover a few random artists with some interesting themes in their promotional videos/art/covers (most readers probably won't have heard of them as they're all British/European), they all bear some similarity to each other starting with Little Boots (covering Beyonce's latest video + some bigger American ones later). Victoria Christina Hesketh took her stage name from the Tinto Brass