Continuity mistake: When the helicopter has crashed and the President and Banning are standing outside, Banning removes his radio and earpiece and throws them to the ground. The earpiece is back in the next shot. (00:40:00)
Other mistake: The agent infiltrates Barkawi's daughter's wedding and sends a message to the US military to bomb the place remotely. On the agent's phone he types "Barkawi on sight" and clicks send, but there is no phone number or contact. (00:04:30)
Revealing mistake: When Mike is throwing Bakari around and starts his speech, pay close attention to Bakari's shirt. The padding is visible underneath it in some shots. (01:17:30)
Revealing mistake: When Bakari is fighting Banning with the machete, the blade gets stuck in some metal bars. In this shot you can see a break line visible in the blade where it snaps a few seconds later. (01:17:00)
Continuity mistake: Throughout the 4x4 chase scene the bullet holes in the windscreen keep changing place. (00:29:10)
Continuity mistake: When the US President gets to London and gets out from the chopper, the sun changes between shots. (00:19:10)
Continuity mistake: When Mike is telling the President the route to the chapel, it is a close up and when Mike says "It's a cluster ****" the president is looking at him nodding, but it then cuts to behind Lynne Jacob's and he is staring at the map. (00:12:50)
Answer: About a year has passed.