Continuity mistake: When Angus is found dead, Daisy has her hands steepled in front of her face, but, in the next shot, her hands are lowered to her chin - except in the mirror, where they are still steepled in front of her face.
Continuity mistake: At the beginning, Rosemary has her glasses in her hand and she tries a couple of times to get her glasses case out of her bag, but she doesn't succeed - except, suddenly, her glasses are gone.
Continuity mistake: The first time Laura attempts to enter the Ebenezer Scrooge room she can't fit and Rosemary has to give her a couple of hard shoves from behind. But, later, she goes in and out easily.
Continuity mistake: When the girls are standing in the doorway of Anges's room, considering staying there, in the reflection of the mirror, Rosemary's hand is over her mouth, but, in the next shot, not in the mirror, her hand is over her forehead.
Continuity mistake: At the very end, the girls, Ben and Burt are celebrating with champagne, but Laura's glass isn't as full as it was in the previous shot and, if you look closely, you can see that she only pretends to take a sip.
Answer: Regents park.