Continuity mistake: At the end of the movie when Eggsy and Hart are talking before the wedding, Hart's eye patch changes from the left side to the right.
Suggested correction: We're still seeing the mirror image of Hart, so the patch on the viewer's left is still Hart's left eye, not his right.
Continuity mistake: When Merlin and Ginger Ale try to restore Harry's memory, a large exercise ball is under Harry's desk. When the water starts rising, the ball has disappeared.
Continuity mistake: When Eggsy is fighting in the car and the robot hand grabs his pistol, from one angle the slide is back (almost like the magazine is empty) but from another angle the slide is forward and ready to fire.
Continuity mistake: Eggsy dives into the sewer and gets soaked and dirty, but when he comes out his hair is very dry.
Continuity mistake: At the beginning, when Eggsy throws Charlie in the car, they leave the car door open but the door is closed in the next shot, while the car speeds off. (00:02:10)
Continuity mistake: Bennie doesn't attack when Jet attacks because he is charging. He leaves his doghouse when he is full, but seconds later, he is already down over 30%.
