Not all of the Harrigan world is industrial. Loulou's — the exclusive private members' club at 5 Hertford Street in Mayfair — is where Eddie's bloody West End night begins. The opulent restaurant in episode five is Bacchanalia Mayfair, a theatrical dining destination inspired by ancient Rome.
The Savoy Hotel's Royal Suite appears in episode two, when Bella Harrigan accepts a deal against Harry's wishes. The Savoy continues to appear across multiple episodes.
Harry Da Souza's apartment was filmed in a penthouse near Charing Cross Station. "Filming there was hard work," Mortimore said, "but it was worth it. The views are magnificent." The apartment sits at the geographic heart of London, equidistant from the East End underworld and the West End glamour — exactly where a fixer would need to be.
The Harrigans' sprawling country estate is Waverton House in Sezincote, Gloucestershire — a private residence near Stow-on-the-Wold, more than two hours' drive from London. Despite looking as though it belongs to the 18th century, the house was actually built between 1978 and 1980, set beside a lake. The stables seen in episode two are part of the same estate.
The barn warehouse with cobbled streets used during a car chase sequence is part of the Luton Hoo estate in Bedfordshire. Hospital scenes were filmed in a disused wing of Hemel Hempstead Hospital. Studio work took place at Elstree Film Studios in Borehamwood, Hertfordshire.
Beyond the UK, production also shot in Antwerp, Belgium, whose medieval architecture and industrial port infrastructure on the River Scheldt provided the international dimension.