Gareth Evans exploded into our filmic consciousness with a pair of hard-sliced pieces of badass action: The Raid and The Raid 2. These films crack open the skulls of whoever watches them with bananas fight choreography, impressive inclusion of Indonesian performers and martial arts styles, and a hyperkinetic, grungy approach to shot construction. Then, Evans gave us the underrated Netflix horror film Apostle, slowing things down while still turning up the heat. Now, with the upcoming Sky Atlantic television series Gangs of London, Evans seems to have combined all of these impulses. The newly released trailer promises deep, family-…