As you may know Carphone Warehouse leaked the Nexus 4 a few weeks back. If you check on their site now they have 2 colour options.
Check out this site for more info: Nexus 4 in white? Carphone Warehouse order page suggests so | Mobile Review Site
Check out this site for more info: Nexus 4 in white? Carphone Warehouse order page suggests so | Mobile Review Site