Continuity mistake: When Oz and Moxey are in the supermarket loading the trolley up with beer, the camera angle changes to a close-up on Moxey then when it returns to Oz, more beer has been removed from the shelves. You can't hear any cans being moved when the camera is on Moxey and there is the same amount of beer in the trolley.
Continuity mistake: When Ally Fraser is climbing from one yacht to the other, you can see the flower that he is wearing on his suit fall off, but when he is on the yacht that Barry and Hazel's wedding is taking place on his flower has returned.