It looks like the new Sony Xperia Z Ultra LTE will launch in the UK next Friday the 13th of September, we previously heard it would launch on the 12th.
A number of retailers have now listed the Sony Xperia Z Ultra with a shipping date of the 13th of September, including Amazon, and more.
The Sony Xperia Z Ultra is designed to be both dust and waterproof, it features a 6.4 inch full HD display with a resolution of 1920 x 1080 pixels.
Other specifications on the Xperia Z Ultra include a quad core Qualcomm Snapdragon 800 processor, 2GB of RAM and 16GB of built in storage, plus a microSD card slot for additional storage.
The Sony Xperia Z ultra comes with a 3,000 mAh battery and features an 8 megapixel Sony Exmor RS sensor, it also comes with Android 4.2.2 Jelly Bean.
Source Xperia Blog