Nexus 4 White Model available in Carphone Warehouse Website UK
Carphone Warehouse website gives two colour options for Nexus 4 and lets you pre-order the phone in White colour as well.
Black: Product code: 18436597
White: Product code: 18460077
Unfortunately, the image for white model doesn't seem to be up.
So, Nexus 4 White seems like a real thing. Are you interested guys?