If you own the original HTC One i.e HTC One (M7), here is some good news for you. Android 5.0 Lollipop OTA update is rolling out to HTC One (M7) to users in Europe. The rollout has already began and many users are already reporting that they have received the update.
Senior Global Online Communications Manager at HTC Corp Jeff Gordon announced this news to M7 owners on twitter. Keep in mind that M7 is two-year old device and even then if it is receiving a Lolipop OTA update, then its great news.
The OTA update package is about 805 MB and brings itself the Android 5.0 build with important bug fixes, as well as enhancements. You can checkout the update notification which talks about these changes. If you remember, M7 comes with Snapdragon 600 quad-core Krait CPU and 4.7 inch 1080p display.