An update enabled 1080p/60 video capture on the HTC U11 first in Taiwan and now in the UK too. The update appears similar, though it is a bit larger. You'll have to download 707MB to update to software version 1.27.91.4 while the Taiwan one was 663MB. Either way, we recommend downloading it over Wi-Fi. HTC U11 gains 1080p/60 video mode in the UK The update also adds the "latest Android security update" (should be the August patch) and as well as the generic-sounding "system enhancements." Source
Source: http://www.gsmarena.com/htc_u11_gains_1080p_60_video_mode_in_the_uk-news-27225.php