Nokia Lumia 920 and Nokia Lumia 820 Windows Phone devices are available in UK from EE under expensive carrier contracts. If you are not a fan such contracts, you can now buy a 4G compatible Nokia Lumia 820 device now and take advantage of 4G network when needed.
Unlocked-Mobiles is now taking pre-order for this Nokia Lumia 820 device for Â£394.98 including taxes. It will support the following bands,
System: GSM Quad Band 850/900/1800/1900 3G/HSDPA & 4G LTE
Source: Unlocked Mobile