I just read the twitter feed of Brendan Arndt, Device Portfolio Manger for 3UK. @wildlime on twitter.
He appears to be testing wp8 phones. He tweeted a pic of a 920 on 14/9/12. He even has his twitter profile pic on the device.
He says it is super fast, buttery smooth and he loves the live tiles
Perhaps it is safe to say these phones are coming to 3UK, possibly after any potential EE exclusivity period.
3UK often sell the phones outright on pay and go but locked to 3. Ok with me as I have a 3 pay and go sim on one of my phones with AYCE (all you can eat data , unlimited) for ?15pm.