Episode #1.2 - S1-E2
Continuity mistake: Richard calls it a day on the investigation, but he's still chatting about it with Camille during a walk. When he says "One thing's always puzzled me about weddings", two women are crossing the street in front of him. Few seconds and a cut later, when he mentions the bouquet, here they are again, the same girls crossing the same street coming from the same direction as before. (00:23:20)
Episode #1.2 - S1-E2
Continuity mistake: Richard and Camille are questioning the maid, Margaret. She turns around after answering about the "Cleaning in progress" label, and her braid is down her back. In the rest of the scene, it is in front of her shoulder. (00:18:45)
Episode #1.1 - S1-E1
Continuity mistake: Following James Lavender to the beach, Richard calls him "a little proprietorial", DS Lily Thomson between cuts has alternately her right hand on her hip or not. (00:14:00)
Episode #1.1 - S1-E1
Continuity mistake: Sgt. Lily Thomson drives detective inspector Poole to the beach shack. In the opening wide shot she has her left hand on the steering wheel, but in the closer angles the hand at 12 o'clock is the right hand instead. (00:09:10)
Answer: Most likely they had only tropical exotic drinks, he wanted an old fashioned English beer.