[UPDATE] Both Nexus 4 models are already sold out in the EU, less than an hour after going on sale. The Nexus 10 16GB remains available for sale at the time of writing. Google’s been having some technical difficulties, as the Play Store grinds to a halt under the demand for orders. In addition, the 3G, 32GB Nexus 7 has also appeared for sale on Google Play today.

Today is the big day for Google – with the search giant launching their Nexus 4 and Nexus 10 devices as well as releasing Android 4.2 Bean to the Galaxy Nexus and Nexus 7.

With the upcoming US launch only a mere hour away at 9AM PST, many are awaiting (impatiently) for their chance to snag up a device. In the United Kingdom the LG Nexus 4 and Samsung Nexus 10 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.

For those unaware, the Google Play pricing breaks down as:

 Android Central