England COVID-19 alert levels by district as in force between 20 and 25 December 2020. (Source) For a map of the current tiers, see File:Second England COVID-19 alert levels by district.svg.
  Tier 1 (Medium)
  Tier 2 (High)
  Tier 3 (Very High)

  Tier 4 (Stay at Home)
Own work
Rcsprinter123