I hope you've got the patience to watch this extraordinarily long video, testing Three's 4G service and putting it up against EE and O2 (as well as comparing...
Gizmodo UK Test 02's 4G Speed
iPhone 5 4G UK EE Speed Test
First hands on with Three UK's 4G network
4G Finally Launched in the U.K.
Vodafone UK 4G Network Speed Test - 4G vs. 3G
How fast is 4g in the UK
Three uk speed test 4g