We followed the colour rule through into the costumes. Our designer, Andrew Cox dressed the kids in strong colours and the adults in more muted ones. Casey (Hannah Tointon - above), the teenager, is stranded between the two worlds. Darker colours shot through with purple and blues. Her hair is fantastic - I loved Jacqui Fowler's idea for the purple streak. I'd have one myself if I had the hair for it. Apart from looking great, the costume, hair and make-up tell a story about each character that goes beyond what the script suggests. The colours of the costumes of the kids become more saturated as the film goes on and the sickness takes a stronger hold on them.