Goofs

When Nobby and Seb were taking a bath, the water level kept changing between camera shots.

When Nobby shows smartphone photos to his kids, the edge of the phone is white with black corners, but when Sebastian takes the phone the edge is entirely black. Likewise, when it was in Nobby's hand the back of the phone was white, but when Sebastian makes a call with it, the back is black. Finally, while Sebastian is holding the phone (the black-backed version), there is a cut back to Nobby and the kids where Nobby is also holding the phone (the white-backed version).

When the MI6 unit is referenced with on screen letters at the beginning of the film, it is two words "Tiger Tail." When it is similarly referenced at the end of the film, it is one word "Tigertail."

The birth canal of an elephant is not located at the rear, nor is it horizontally oriented: it is located on their lower stomach and is vertically oriented (as gravity is needed to deliver an elephant calf).

When Chilcott locates Sebastian in Grimsby, the laser pointer dot and the beam it leaves are visible on one of men in the pub. The beam from a laser pointer is only visible if it's going through smoke, fog, or another visible gas. The air in the pub is very clear so the beam wouldn't be visible.

When the two brothers take a bath together the soap bottle on the background changes between a close-up and another.

When showing Jordan Beber's prior record at 3:57, the word ammunition is misspelled "amunition".

When showing Jordan Beber's prior record at 3:57, the Grand Theft entry in Hungary is written as Sept, 09 2011 instead of Sept 09, 2011.

Nobby goes quite a distance to buy his mattress at the beginning of the film, as the bus he gets on goes via Grays, and that particular service and route is in South East Essex. Also, the train pulling into Grimsby Town is the type used by the C2C service, which is the London Fenchurch Street to Southend line, also in South East Essex.

During the pitch invasion scene, once the camera switches to the rear view up to just after the boys jump into the crowd, 'Sebastian' is quite obviously played by a much older, larger boy.

At the beginning of the film, the agent played by Mark Strong has to reload a magazine during a gun fight, after entering the magazine and releasing the slide (which chambers a round), he racks the slide which causes an unspent round to be ejected, a trained special agent most likely wouldn't have made this mistake.