Found by Jazzcool
Global Version Xiaomi Mi Max 2 Snapdragon 625 Octa Core 5300maH 4GB 64GB 6.44". The above price is for Black version, white colour is approx. £226.
8% quidco cashback (aliexpress)
The price is with 1 year UK Warranty (I don't know how good this warranty is, haven't tried it).
Looks a good phone at a very good price for the specs, I have Xiaomi Note 4 and is really a good phone.