The latest in the Xperia family, the Sony Xperia Z (http://www.gsmarena.com/sony_xperia_z-5204.php), which was announced in the recently-concluded CES 2013, will go sale in the UK beginning in February 28 and Three has already started accepting pre-orders (http://www.three.co.uk/Discover/Sony_Xperia_Z?id=1183) for the smartphone.
(http://cdn.gsmarena.com/vv/newsimg/13/02/xperia-z-release/gsmarena_001.jpg)
According to Three, Sony Xperia Z will be available for