Visible crew/equipment: When Eggsy is in the car yelling at his mum's boyfriend and the windows start to go up, you can see a man's head next him on the floor.
Kingsman: The Secret Service (2014)
1 visible crew/equipment mistake - chronological order
Directed by: Matthew Vaughn
Starring: Samuel L. Jackson, Colin Firth, Mark Hamill, Taron Egerton
Factual error: When the barracks are completely flooded, Eggsy uses his bare fist to punch through a large two-way mirror to escape. The fact is that any glass (or plexiglas) thick enough to contain hundreds (or thousands) of tons of water without bursting would be as impenetrable as concrete to Eggsy's bare fist. He would need a chisel-tipped jackhammer to penetrate such a mirror.
Harry Hart: Are we going to stand around here all day, or are we going to fight?
Trivia: Eggsy needs the code for the prison door that holds Princess Tilde. The code given is "2625." This spells out the word "anal" on a telephone keypad.
Question: Harry told Dean he had enough information on him to have him locked up for life. What information was this?
Answer: CCTV surveillance and such like. And a possible kingsman informant embedded in the gang leaking incriminating info. Or police informer who reports to kingsman. Or, y'know, he was lying.
Answer: Details aren't given, but it seems that Dean is involved in local crime along with the gang that hangs around with him. Even if Harry is bluffing, and doesn't have specific proof, it is clear that he is abusive and he has the recording of him threatening Eggsy.