Some of the deserted street scenes were filmed in Newport Gwent. A well known pub called The Hornblower can clearly be seen. The pub was demolished a few years ago.
Paul Kasey, who played the red robot, had more than 91 credited episodes or appearances in all of Russell T Davies Productions ( Doctor Who, Torchwood, the Sarah Jane Adventures, Doctor Who at the proms, Doctor Who confidential, etc.) during ten years between the first episode of new Doctor Who (Rose), and a Doctor Who episode in 2014.