The new HTC M8 looks great, but is very pricey, especially for me when I don't want or need a contract phone. I might lool into going for a cheaper non-branded smartphone and possibly installing Linux on it. There seems to be some pretty decent looking ones for around £150.
All I need a phone to do is run the Blockchain App and a couple of other apps and make calls, not bothered about much else.
Just scanning ebay now see what I can pickup
What budget you looking at? There's a recent article here for phones under £200: