I just caught a trailer for this , apparently the main character is a pre op mtf hitwoman (played by a none trans actor ::) ) also set in manchester.
http://skyatlantic.sky.com/hit-and-miss-more-casting-news (http://skyatlantic.sky.com/hit-and-miss-more-casting-news)
I'm kinda wondering which way it will go, but the actress cast was in boys don't cry opposite ms swank, but still :-\