Holby City cast as Greg Douglas in series twelve. "Holby City" and "Casualty" are both set in Holby City Hospital, in the fictional county of Wyvern, in the southwest of England close to the Welsh border. The city exterior is represented by Bristol, though "Holby City" is filmed at BBC Elstree Centre in Borehamwood, Hertfordshire. The "Casualty" set in Bristol was not large enough to encompass the surgical ward and operating theatre required for "Holby City", and as a result, some crossover scenes in the first episode had to be shot twice, first on the "Casualty" set and then again at Elstree,
University Hospital Lewisham on the roof. In 2012, architects AWW worked with the hospital to re-plan five wards and medical facilities whilst maintaining the Emergency Department. The expanded facilities improve efficiency with the addition of a new Children's Emergency Department, Urgent Care Centre and new emergency x-ray facilities. In July 2012, South London Healthcare NHS Trust was put into financial administration. A government report in 2012 recommended that three SLHT hospitals should be taken over by nearby NHS trusts and that the University Hospital Lewisham Accident and Emergency unit should close, with A&E patients instead going to the SLHT-run Queen Elizabeth Hospital in