I recommend the Wileyfox Swift 2 Plus, available at Amazon for £149.99 + Free shipping
Like Motorola's Moto G series, the Swift 2 has a relatively unadulterated Android experience. In this case, you have the option of sticking with the CyanogenMod 13, which it ships with, upgrading to their official ROM, currently at 7.1.2, or installing LineageOS.
Storage is 32 GB, which should be sufficient for most, especially if microSD expansion and cloud storage are taken advantage of. RAM is similarly generous, with 3 GB, meaning multitasking and cache won't be a problem.
The camera sensor is a decent 16 MP, though the dynamic range is unspectacular. The aperture (f/2.0) is larger than most phones at this price, though as can be expected, there is no Optical Image Stabilization. Battery life is mediocre at best, though some users report 5 to 7 hours SoT.
The display is a undistinguished 720p LCD. It has most of the usual extras, such as NFC, USB-C and Speed Charging. The fingerprint sensor is on the back of the phone – though normally handy, it may be less convenient if you usually leave it lying on a table, – and unfortunately the second SIM slot only supports 2G and is obstructed if you choose to install a microSD card for storage.
Overall, the Wileyfox Swift 2 Plus is a solid and stylish phone for the sub-£200 segment, and I doubt you'll go wrong with it.