Same deal as the other Xiaomi redmi note 3 offer posted last week except this is the 32gb/3gb ram premium top end model!
Usual pitfalls - imported from China, so possible custom tax charges, warranty somewhere in China, and limited 4g support (3g is available on all networks tho!), no android marshmallow yet, an ok camera, long delivery time and a bit of a fiddle as may need to reinstall official rom.
The plus side is that its a risk worth taking, if you like a gamble! If it works out well, you get one hell of an amazing phone for under £150! Nearest spec phone you can get for that price in UK, prob be a Honor5x on sale, Altho a good phone does not come close to the Redmi Note 3! This note 3 model is a serious high end budget phone, I doubt anything in uk comes close at that price, in terms of the phone your getting.
Possible topcashback too, makes it a bargain!