Google announced on their blog this morning, that Android 5.1 would be rolling out to Nexus devices today. The first signs of this have shown up with Google releasing factory images for selected Nexus devices on their developer page.
There’s currently three images released so far, for the Nexus 5, Nexus 7 (2012) Wi-Fi and Nexus 10 and the associated Binaries (Drivers) for the 5.1.0 build are also available on the developers page as well. The build that’s made it to prime-time is Android 5.1.0 (LMY47D), the same we’ve seen in our server logs.
To download the images and flash them head on over to the Nexus Factory Images page and download them right now, or if you wait a few days we should have some links to Over The Air (OTA) packages for you to flash.