In reply to Siward:
I bought the Sony Xperia Compact second hand off ebay, for about £110. I wasn't impressed. You have to manually 'plug' the charging port with a waterproof cover, every time you use it, which I found annoying. I took it on a fell run in a storm, it was loose in my bumbag and got wet inside as the back panel had slightly lifted off - it's just stuck on with some type of adhiesive. It never worked after that.
Now I have the Motorola G, which I bought new for £160. It will supposedly withstand being submerged in upto 1m of water for a short period of time, which is better than the Sony and gives me some comfort when taking risky shots, such as on sea cliffs! Overall it's been an impressive phone and great for taking on climbing trips - it does everything I need it to, but it isn't so expensive that I can't replace it should I end up breaking it. I would recommend getting the higher storage option, if you can find it.