I logged onto Phones4U twitter feed, and if you read up on one of the questions there, they have stated that they won't be selling SIM-Free 920s...
Phones4U "our Lumia 920's will not be suitable for customers wishing to purchase SIM free as they're all locked to @EE. Sorry!"...
Someone "what? Is that true? I went to your Crawley store and asked about it and they said it would be unlocked"
Phones4U "Hi, unfortunately this won't be unlocked no. We're sorry that you've been misinformed by our store staff! Thanks, Liz"
What's going on? Guess we'll have to wait a few days more!