Google has started the roll-out of Android 5.1.1 to Indian LG Nexus 5, which was launched in November 2013. The 25MB update with build number LMY48B is rolling out over-the-air.
If you are an owner of Nexus 5, you might have already received the update notification or it is surely on the way. To check the update availability manually, reach to settings> About > System updates.
Just to recall, the Android 5.1.1 is not a major upgrade, as it primarily aimed to fix previous bugs and performance improvements. If you have installed the update successfully on your Nexus 5, do share your experience via comments below.