The Line of Duty isn't based on real events. It's a fictional storyline crafted by the writers to engage the audience with an interesting plot and characters.
Series 1 of Line of Duty is purely fictional. The creators crafted the story and characters for entertainment purposes rather than drawing from actual happenings. The plot and scenarios are made up to engage and thrill the viewers.
Not entirely. While it may have some loose connections to real events in 2017, it's mostly a fictional creation with fictional characters and plotlines.