Deleted Facebook off my phone, used safari more and focused less on Twitter and Snapchat.
Still not really making any difference, I've pretty much gave up now with this phone.
I will be going to Apple in the new year to try and get this sorted. Hopefully they can give me a refurb that is on 8.0.2 software or lower.
Really can't be bothered with a phone that doesn't last as long as my old iPhone 5.
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I can tell you that when in the UK I experience MUCH worse battery life than in the US. The signal is so weak on EE and O2 in so many places (especially in built up areas of London) that the phone has to jump between signals so often and that kills battery life.
I wouldn't be surprised if that's the major issue for you. I can't remember which networks have LTE, but if you turn off LTE (if you have it), I'd bet that solves your problem. Bouncing from LTE to 3G over and over kills battery. I'm experiencing that issue right now in Seattle with a bugged-out tower on AT&T.