Production started in December 2007, beginning with various shots of the Imaginarium wagon moving about the London suburbs (to be more specific, Bounds Green, London) on the evening of 9 December. The carnival scenes were shot at Potters Field between 10–11 December; shooting then moved to the abandoned Battersea Power Station for three days, where the production had set up offices nearby. After a full day of set-up, the hanging scenes at Blackfriars Bridge were shot for three hours on the evening of 17 December.