Where to buy the Nexus 4 - UK

Could anyone help with creating a more centralised list of where to buy the N4 in the UK? It's tricky to find anywhere other than the Carphone Warehouse and O2, whose prices are very high compared to Google's (I'm not flaming, I know why they have to be). I was wondering if anyone knew of any other lesser known retailers selling the phone for less?

I've been looking for where to buy the N4 in the UK without much luck - the only two places I can find is the Carphone Warehouse and O2, both of whose prices are out of my range ( :[ ). I have a strict £376.73 (don't forget the 73p ;P) budget for the N4 and a if possible, a bumper.