It seems that the much mentioned PIS update has unfortunately been rolled out in full as every Arterio I've seen since Friday (and I've seen a large number of them) seem to be displaying the ridiculous "Lon W'loo" instead of the full name (despite it fitting entirely, I know it's necessary on the Desiros) and "Car XYZ" Instead of "Coach XYZ".
At least on my line, this update presumably means that I'll also be subjected to the "This is BTP" and "our trains are patrolled by..." announcements at almost every stop on all 701 journeys from now on as this seemed to be standard the the few units that had already been updated