HTC One for UK is now having an OTA update for OS to Android 4.3 Jelly Bean and Sense 5.5. The news was told by HTC on their Twitter account. The Tweet clearly states about the HTC One for UK is only getting Android 4.3 OTA with Sense 5.5 update. HTC stated that if you need to install the update the HTC One for UK should in your hands. And you need to check by going to Settings > About > Software updates and you don’t need to do it if the notification for OTA update is already shown.
While we also know that some HTC One devices already have gotten update of Android 4.3 Jelly Bean before, but without updating to Sense 5.5. But now announced it together which making us confusing. So you need to reinstall the Android 4.3 update on HTC One UK.
The update came with version name 3.62.401.1 and it came with some new features like enhancement to Daydream and OpenGL ES 3.0 support. And the Sense 5.5 have also some new features backed to Blinkfeed like adding Instagram and Google+ feeds are the front of some new features.