A new Android Lollipop firmware update with build number 14.5.A.0.270 has been certified by the PTCRB for all variants of the Xperia Z1, Xperia Z1 Compact and Xperia Z Ultra. This compares to current build version 14.5.A.0.242. The likelihood is that the update brings the same new bug-fixing features found in the recent update for the Xperia Z2/Z3 series, along with the new clear all button for recent apps. We’ll let you know once it starts to roll.
Thanks Vasilis K!