It is on LoveFilm in the UK, streaming. Which is one reason that it is not available as a Region 2 DVD ('cos sales would upset Amazon.co.uk and their LoveFilm exclusive).
Bloody heck! I'm watching via Netflix in the US; take a look there. Otherwise, you have my sympathy!
It's quite good, though I've only seen a few episodes. Suffice, trying to avoid spoilers, in the first few seconds, a) the 'good guys' show perfectly well how'd they answer the Greedo question, b) the Lord helps those who help themselves...

I have very much enjoyed Ripper Street, but Copper felt a bit more the real deal. But that may have been because it was in the barbaric new world.

Doug