Goofs

When Mrs. Silver and Mr. Pringle come to Mr. Hoppy's flat for a meal, he doesn't have three wine glasses, but in a later fleeting 2- or 3-second shot, there are three wine glasses on the meal table.

Mr. Hoppy first purchases 16 tortoises to start "growing" Mrs. Silver's pet. At 27:30 minutes, 16 specimens are seen swimming in an aquarium. Tortoises are land animals and do not ordinarily swim in water. Those must be aquatic turtles instead.

When Mrs. Silver and Mr. Hoppy are dancing together at the end of the film, Mr. Hoppy moves Mrs. Silver's hand to his mouth for a kiss but is actually kissing the back of his own hand.

Mr Pringle twice says that the moment of his birth came about as a result of his father driving too quickly over a speed bump. This would make Pringle, at the time of the film's release (2015) no older than 32 years old, as speed bumps weren't introduced in the UK until 1987. Pringle appears to be of a similar age to Mrs. Silver (Judith Dench), and Mr. Hoppy (Dustin Hoffman), who were born in 1934 and 1937 respectively.