With all that is going on at the moment in the UK with the Orange/T-Mobile merger, LTE in 1800 MHz, upcoming auctions for 800 and 2600 MHz spectrum in 2012, potential sale of 1800 MHz spectrum of EE to H3G, etc. it's a bit difficult to keep track of who actually has spectrum where and how much. Is your head spinning? Mine does.
But here's an interesting document released by Ofcom that shows who has what kind of spectrum in 2012 that sheds some light on the current situation. The details are on page 8. Quite insightful.