Susanna Clarke visits the set of the BBC adaptation of her book, Jonathan Strange and Mr. Norell.

But nothing, I find, has prepared me for the sight of my own characters walking about. A playwright or screenwriter must expect it; a novelist doesnt and naturally concludes that she has gone mad. (What do they need so many umbrellas for? Dont they realise that they are imaginary?)

Susanna Clarke visits the set of the BBC adaptation of her book, Jonathan Strange and Mr. Norell.