Continuity mistake: When M arrives to see Mallory, a bag is placed on the ground near her seat. It is still there just as she stands up and grabs her coat. In the next shot, the bag is gone and she walks out without it.
Character mistake: There is no way an operative of Q's position and experience would have plugged a device taken from a bad guy into their network. Especially as they had had a security hack only a few days earlier, and this was a security establishment. It would have been thoroughly tested and checked on a stand-alone, air-gapped setup first.
Continuity mistake: After Silva shoots Severine, he never puts his gun down. As Bond begins shooting the henchmen, Silva can briefly be seen, gun in hand, running backwards away from Bond. When Bond kills the last of the henchmen, and turns to Silva, Silva is unarmed.
Continuity mistake: During the yacht scene, Severine and Bond are standing looking out to the island. Severine is barefoot. Once on the island, she is wearing black heels. If she knew that she would need shoes to walk on the island, which is filled with rubble, she would already have them. She would have to walk back to her room on the yacht to get them. This is highly unlikely given the fact that they are being held hostage, and she could use her heels as a weapon.
Continuity mistake: During the pre-credits car chase Eve drives really fast and knocks a group of parked motorbikes that wobble, about to fall. From the immediate opposite angle the bikes remain undamaged and stand perfectly still.
Continuity mistake: During the first car chase right before Eve gets stuck in the traffic jam a shot inside the car shows that the right lane has barely no cars. Half a second later from an angle shot from outside the right lane is jammed.
Continuity mistake: While Eve drives and swerves to avoid cars, before she encounters the red truck two yellow taxis drive by and then a black car does. When the angle changes the second yellow taxi is driving by again.
Other mistake: When M is attacked by Silva during the parliamentary committee's hearing, Silva enters the room from M's back and M turns 180° around her own axis to face Silva - now M's own desk is at her back, that is, her very own desk cannot and is not protecting her from Silva. A few seconds later, after the gun battle intensifies, her desk is now located between herself and Silva, and she is using the desk as a protective shield against Silva's bullets. (01:40:45 - 01:41:20)
Continuity mistake: During the motorbike chase, Eve gets stuck in a traffic jam and drives in reverse, damaging a yellow car's hood. In the next angle the hood is undamaged.
Revealing mistake: During the motorbike chase, after a man says "they're on the rooftop of the grand bazaar" Bond's bike jumps and right after there's a wide shot where the driver is not Daniel Craig but a stuntman.
Chosen answer: Companion of the Order of Saints Michael and George and Royal Navy.
Captain Defenestrator