This dataset shows the maximum observed utilisations of operational data centres identified in UK Power Networks' region. The utilisations have been determined using actual demand data from connected sites within UK Power Networks licence areas, from 1 January 2023 onwards. Maximum utilisations are expressed proportionally, by comparing the maximum half-hourly observed import power seen across the site's meter point(s), against the meter's maximum import capacity. Units for both measures are apparent power, in kilovolt amperes (kVA). To protect the identity of the sites, data points have been anonymised and only the site's voltage level information has been provided - and our estimation of the data centre type - has been provided.