Thanks, just had a look there and seems a good option. Also Sony Xperia z5 looks a pretty good option for camera on there. Just £130 and better than the Galaxy S6 apparently.Refurbished phones from places like Envirophone etc are worth a look.
The S6 is available for around £150 refurbed, which will come with a warranty and has a 16mp camera as opposed to the S7/S7edge's 12mp
Edit: Actually the LG G4 seems similar spec to the xperia z5 and goes for much cheaper - £85 from a refurbisher on ebay.