Near the beginning of the episode, just before the first hotel interior, and later when the police make their initial visit to speak to Jessica, there are exterior shots of a hotel with a sign "The Dorchester." Later, when the police return to the hotel and then rush out the front door to investigate a "rather nasty incident," they pass behind a sign saying "Atwood Hotel."
Left hand drive car parked in a busy street with no yellow line parking restrictions in, what one assumes, is the 'West End' of London (even for 1992).
American terminology used instead of English expressions by Daisy Collins (Kim Braden); 'Cat Pound' for 'Cattery' or 'Cat Rescue Centre' and Julian Fontaine (Trevor Eve); 'Service Elevator' for 'Service Lift' and 'Charade' for 'Charade with a long 'a' as in Charaade'
Jessica said that Fontaine took body from the room upstairs where he threw it from the balcony. Fontaine agreed. That does not match the events. He could not have taken the body directly to the roof because Jessica found it in a pile of trash in a storage room on the ground floor. It then disappeared while she was calling the police a second time. Also, the body was not thrown from a balcony, but out a window as shown when the camera panned up to an open window with fluttering curtains.