Google’s new Nexus 4 smartphone officially went on sale in the UK this morning with several reports indicate initial supplies of the device sold out within 30 minutes. The Register and others confirmed that both the 8GB and 16GB models of the new Nexus 4 are now listed as with a “Notify me” button instead of “Buy now.” TechCrunch reported that the 32GB model of the Nexus 10 is no longer in stock, while tweets from customers seem to point to large crowds forming for the retail launch of the device. The US launch of the Nexus 4 and Nexus 10 tablet is slated for 9AM PST this morning. We’ll be bringing you updates following the launch.