 The series is set in the City of London and makes full use of the city's iconic buildings as visual references.Cooper Fozard's offices are actually portrayed using two separate buildings for exterior shots — Thomas More Square in Wapping is portrayed as Cooper Fozard's office building, while roof shots, which often provide breaks within episode stories to focus on series spanning themes, are filmed at 1 Poultry.Other locations have included The Bank of England and St Paul's Cathedral.