Continuity mistake: When Eggsy is in the interview room at the police station, in a wide shot the tape recorder is on the table by itself, with nothing around it. Eggsy demands a phonecall, the police officer leaves, and Eggsy then reaches beside the recorder and picks up a cordless phone which has appeared from nowhere. (00:16:45)
Continuity mistake: When the fairies are cooking and Aurora says she is moving out, for a brief shot the amount of flour on the left side of Knotgrass' brown apron disappears. Shot changes to the previous angle and the flour is back. It's not because of magic or due to a plotwise decision, it's a continuity mistake between two different takes.
Suggested correction: Considering the flour on her face is fading away, who's to say it's not on her apron as well?