Regrettably it is not even close to the shadow of Horowitz's drama masterpiece Collision (2009). But actor Charlie Creed-Miles is very impressive as the cynical copper and the title sequence has the distinctive and classy style of Momoco (Luther). Injustice is to be remade stateside by Dick Wolf. He shouldn't rush...
We reviewed Injustice when ITV (then ITV1) aired it in 2011:
http://tattard2.blogspot.fr/2011/06/injustice-itv1.html (Episode 1)
http://tattard2.blogspot.fr/2011/06/injustice-episodes-two-three-itv1.html (Episodes 2 and 3)
http://tattard2.blogspot.fr/2011/06/philanthropist.html (Episodes 4 and 5)
http://www.arte.tv/fr/injustice-une-miniserie-en-cinq-episodes/7259608,CmC=7259650.html (In French)