The international version of the HTC One has already received the Android 4.3 Jelly Bean updates but the device users in the United Kingdom had to wait a bit longer. The new firmware upgrades for the HTC One is now seeding across the country.
There is no say on why the upgrades were delayed, but source presumes that the optimizations required for specific UK carriers might have been the reason for the delay. The changes that come with the new firmware for the HTC One users do not vary from that of the international version which basically means that the upgrade brings the all new Sense 5.5 User Interface. The Android 4.3 Jelly Bean update will pop up on your device screen and in case you missed it you can still download the new firmware manually from the Settings Menu.