Thanks for all the responses, guys. I think I'll have to check out the premium cable options as soon as I arrive in London and hopefully that will work out, but I'll keep Streamo with Chromecast in mind as a second option.
If any Rangers fans in London want to grab a drink sometime, shoot me a PM. Would be great to get to know some hockey fans while I'm living there.
I recommend *************. Great highquality streams and you can watch the games the day after if you dont want to stay up all night. Make sure you have decent bandwidth though or it's gonna be choppy.