To cite covid19.nhs.data in publications use:

  Sophie Meakin, Sam Abbott, and Sebastian Funk (2020). NHS trust level
  Covid-19 data aggregated to a range of spatial scales, DOI:
  10.5281/zenodo.4447465

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {NHS trust level Covid-19 data aggregated to a range of spatial scales},
    author = {Sophie Meakin and Sam Abbott and Sebastian Funk},
    year = {2021},
    doi = {10.5281/zenodo.4447465},
  }