Xiaomi Mi5s Gold. 64GB/3GB Snapdragon 821. Official Global Rom, so will receive updates OTA. Also, Google play installed out of the box. Silver is also available but is slightly more money. Unfortunately, no Band 20.
Xiaomi Mi5s Snapdragon 821 64GB Rom/3GB RAM 5.15" Full HD display 4G LTE £227.08 delivered @ Geekbuying