Which telescope's completion in the state of Hawaii will mark the decommission of the Unite Kingdom Infrared Telescope?
United Kingdom Infrared Telescope:  The telescope is set to be decommissioned after completion of the Thirty Meter Telescope as part of the Mauna Kea Comprehensive Management Plan. Thirty Meter Telescope: The Thirty Meter Telescope (TMT) is a proposed astronomical observatory with an extremely large telescope (ELT) that has become the source of controversy over its planned location on Mauna Kea in the US state of Hawaii.
Thirty Meter Telescope