Coming just after the Napoleonic wars, Peterloo looks at a place and time in history that is not often looked at. I suppose you could compare it to Poldark (2015), though without any swashbuckling or sassy characters, or even the boyhood world of D.H.Lawence (Sons and Lovers). Even after a full hour into this movie, and without a lot happening, I was still being impressed by the authentic script and the historical detail. Basically, Peterloo will give you a two hour immersion into 1820 Manchester. After two hours, which is too long, we finally get to the day in question. I leave it to others to decide if that's reasonable. It was for me, just, but then my actual hobby is reading history.