As the team arrives at the burning building, they are threatened by left-behind ammo "shooting" at them. Uncontained ammo doesn't "fire" as if from a gun; it explodes as the powder heats, but without a chamber and barrel, the bullets don't travel far, and they tumble wildly, so they certainly don't leave perfectly round holes in car windows as was seen while the officers ducked behind their vehicles.
The letters and digits on the registration plates on the various vehicles do not correspond to the format used in the UK.
The plug sockets in the ex-wife's house show that it wasn't filmed in Northern Ireland.
The guard in the bar's basement is using a sawed off double barreled shotgun. Yet the sound effect of a pump action shotgun being cocked is played, and he moves his arm in a pumping motion. The kind of shotgun he has is cocked with a hammer, not a pump.