Having seen what I've seen in South Sudan, there's no way I can't talk about it.

Joanna points her camera at a section of society unused to having cameras pointed at it. But I don't know about categorising them in terms of class; I'm a bit wary of that. My dad is the son of a shipbuilder.

I always found the extraordinary loss of life in the First World War very moving. I remember learning about it as a very young child, as an eight- or nine-year-old, asking my teachers what poppies were for. Every year the teachers would suddenly wear these red paper flowers in their lapels, and I would say 'What does that mean?'

Real love is strange and changeable… but also somehow constant.

I had huge fun with Chris Evans, as Captain America, because super-soldier though he may be, he's still a man, up against a God who in his own mind is infinitely superior. Then, in the ring with The Hulk, we've got this silver tongued, lightening quick mind up against the embodiment of rage..Loki has this mercurial, transformative ability, not just physically but intellectually, so not all the fights are purely physical. Mind games? Maybe.

Don’t judge people on who they used to be. Allow them to be who they are now.

I think cruelty is just loneliness disguised as bitterness.