So for the Synch retention Unit they should wear Nice Black leather trench coats like a previous user metioned.If you don't know what the synch retention unit is then they are highly trained Androids part of the commonwealth police who track down escaped androids such as Harkness.In manner of fact Harkness used to be a top tracker in this organisation.
The regular Commonwealth Androids/soldiers/police should wear a highly advanced blue/hued combat armour hers an example on Deviant art-http://www.google.ie/imgres?imgurl=http://www.menstrenchcoats.org/images/mens%2520trench%2520coat%2520full-length.jpg&imgrefurl=http://www.menstrenchcoats.org/Men%27s-trench-coat.html&usg=__oqZnkoYAInEb4vxXmsjKN9HgTRk=&h=695&w=300&sz=31&hl=en&start=0&zoom=1&tbnid=f0FW6zy1i1mfRM:&tbnh=143&tbnw=61&ei=LYeSTdO3FM6XhQfooJGNDw&prev=/images%3Fq%3Dblack%2Btrench%2Bcoat%26um%3D1%26hl%3Den%26biw%3D1440%26bih%3D615%26tbs%3Disch:1&um=1&itbs=1&iact=rc&dur=279&oei=LYeSTdO3FM6XhQfooJGNDw&page=1&ndsp=29&ved=1t:429,r:5,s:0&tx=36&ty=73
The slave androids like the lowest androids who know nothing but servitude should wear colored uniforms based on their job within the institute.