Added information about how cases and contacts are reached.
Updated to reflect changes in the reporting of positivity rates and lateral flow tests.
Updated to add clarity on number of contacts who were reached by the phone or online.
Updated to reflect that UK testing is no longer included in the publication.
Updated to include additional information on new LFD and PCR test conducted breakdowns.
Updated to include information on the operational change regarding household contacts under 18.
Updated methodology for how contacts under 18 are reached and add further details on the different types of swab tests.
Updated to include information on lateral flow device tests.
Updated with additional detail for how testing capacity is calculated.
Updated to better reflect the terminology for reaching cases and contacts, and to provide more information on some pillar 4 studies.
Updated to include new terminology for cases managed or not managed by local health protection teams (previous known as complex and non-complex cases).
Updated with more information on the NHS Test and Trace app.
Updated with details on the new methodology for people tested and people testing positive. Added details about the NHS COVID-19 app.
Updated to reflect the new breakdown on cases and contacts reached by phone or online.
Updated to include methodology for additional local authority data published for pillar 2 tests processed.
Update to reflect new information published on the following: distance to take a test in-person within pillar 2, UK tests processed and testing capacity split by swab tests and antibody tests, demographic breakdowns for people newly tested and people newly testing positive.
Updated to reflect the new breakdown between regional and local test sites.
Updated how testing capacity is defined and calculated.
Added information about how cases and contacts are matched to an upper-tier local authority.