Continuity mistake: After the girls have seen the site of their next job, Rosemary hands Laura the keys to the Rover. Laura has a bag over her right shoulder. When she climbs into the Rover and closes the door, the shoulder strap of her bag vanishes.
Continuity mistake: Near the end, Laura is pouring the champagne, but while she's pouring it, Lydia and Penelope have their glasses filled to the top in front of them, but Laura hadn't finished pouring it yet.
Except for the first episode, "And No Birds Sing", where Laura drinks a glass of wine in 2 gulps, she never takes a sip of her drinks - wine, apple juice, nothing - except for tea. She pretends to drink, but doesn't succeed.