She said: "When I wrote it, I thought, have I got the courage to not be liked? That was my challenge. But I wanted to look at the blame culture: the fact that, for instance, years ago it was reported that 80 per cent of muggings were done by black boys and they said, 'Well, that's just London' - and what concerned me was no-one said, 'Is this true? What's happening? Why?'