Sergeant Gerry Boyle is a cop, working in a small town in County Galway, in the western part of Ireland, with a love of prostitutes, dropping acid on his days off and a dying mother. Whilst on the job, he doesn't follow the rulebook and he thinks that everyone he's met is an idiot.
Continue: The Guard Trailer
The '12 Years A Slave' director will receive the accolade at the London Film Festival in October.
Critics from all over the world were asked to name the best movie of the past 16 years.