A good crime story.
It shows that in the UK unarmed police officers are beaten, assaulted and murdered with no firearm to defend themselves.
Although like a lot of UK films and TV programs, I had to watch with English subtitles, because they do not speak English there....
I like watching foreign shows online so I am used to subtitles. :p
UK police and the public do not wish the police to be mass armed. Tragic as police deaths are, they are a very low number per year of decade.
I think the problem is with your hearing, not the accents. Try listening and getting the accents. It easy just to tune out and not try.
And yes, Happy Valley is a very good programme. I would be happy to recommend classic and current British TV and film.
Although our police by and large have no firearms, they are not quite undefended.
http://en.wikipedia.org/wiki/Uniforms_and_equipment_of_the_British_police#Protective_equipment
http://en.wikipedia.org/wiki/Police_use_of_firearms_in_the_United_Kingdom