Callan Bond’s review published on Letterboxd :
Somewhat slow-burning, but solid Michael Caine vigilante thriller. Comparable to Gran Torino, but that movie has a much stronger narrative for both Clint Eastwood's protagonist and the main side characters in the movie. In Harry Brown, Michael Caine is really the only character of note; the side characters are fairly forgettable.
There's an unnecessary twist at the end that doesn't serve much purpose, and some slow stretches, but there also is some satisfying vigilante justice to be had in this generally well-shot and well-acted drama/thriller.