we wrapped up The Informer last night. definitely recommend, but with some caveats.
it hits some big bumps along the way with some goofy motives/writing (for the motives/actions), and I found the who-dunnit reveal to be cringe/groan-worthy.
that said- the rest is pretty excellent and still justifies watching this, IMO. great casting and acting- especially raza (eta: Nabhaan Rizwan... google says it's his tv debut), who gives a star-making performance. paddy considine is fantastic, as is most everybody else. I think the expression is "mise en scene"- the show nails it (at least to an outsider)... putting me into the sounds, looks and feel of a london I'd never get to know (immigrants, council-housing, kebab-shops, art-school, etc) that even if fake, never felt it. well filmed, well acted, well written (in terms of dialogue)... just has some moments that make you question what's going on (unfortunately) and an truly unfortunate reveal.