HTC has begun rolling out a second Android 4.4.2-based over-the-air update for the 2013 HTC One (M7) to some European customers. Today's 205MB update to version 4.19.401.11 follows the withdrawal of the earlier KitKat update due to "difficulties" experienced by some users. Today's OTA changelog references "support for more routers," suggesting incompatibility with certain Wifi equipment may have led to the earlier ROM being pulled.
In any case, European HTC One owners in certain regions — including Nordic countries, which tend to get new software first — should now be able to update to the new ROM by heading to Settings > About phone > Software updates. As always, other regions and carrier-branded phones may have a little longer to wait.