The HadCRUT5 dataset is compiled by the Met Office and the University of East Anglia, with support from the National Centre for Atmospheric Research. HadCRUT5 is the most recent dataset to report its global findings for 2021. It shows that the year was 0.76 ± 0.04 °C above the 1961-1990 average, placing it joint sixth warmest (with 2018). When compared with the pre-industrial global reference period, the year was 1.1 ± 0.1 °C above the 1850-1900 average. This aligns extremely well with figures already published by other international centres.