A new firmware update with build number 23.0.1.A.4.30 is currently rolling out to Wi-Fi variants (SGP511/SGP512) of the Xperia Z2 Tablet. This updates the firmware from the previous Android 4.4.4 KitKat build (23.0.1.A.0.167). The 16GB Wi-Fi SKU is rolling for ‘Generic UK’ and a number of carriers, whilst the 32GB SKU is only released across carriers at the time of publishing.
Thanks Edison!