Marshmallow update will reach some Sony Xperia Z3, Z4 Tablet and Z5 owners from March 710
@FalseNugget it's set to roll out from March 7th for Xperia Z5 series, Z4 Tablet and Z3+ – we will share confirmed timings when its ready— Sony Xperia GB (@sonyxperiagb) February 15, 2016
Of course, "set to" doesn't instill confidence that the update will definitely commence from that date, and it's clear that Sony Xperia GB is remaining tentative in its estimates. It's always risky to get hopes up based on status updates like these, only to have them dashed by delays or cancellations. But at least it's something to go by, and while Sony GB doesn't speak for the company as a whole, it's encouraging for those in the United States and other parts of the world.
Sony's Marshmallow beta program has been in full swing recently, and testers have been reporting back positively. If end users can be as happy with the polished, finished version, then it'll surely be worth the wait.
Here's hoping that the wait isn't too arduous, and that next month's roll-out expands beyond the confines of Britain.