The COVID-19 pandemic in the United Kingdom is a part of the worldwide pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). In the United Kingdom, it has resulted in 25,097,683 confirmed cases, and is associated with 232,112 deaths up to 26 January 2025.
The virus began circulating in the country in early 2020, arriving primarily from travel elsewhere in Europe. Various sectors responded, with more widespread public health measures incrementally introduced from March 2020. The first wave was at the time one of the world's largest outbreaks. By mid-April the peak had been passed and restrictions were gradually eased. A second wave, with a new variant that originated in the UK becoming dominant, began in the autumn and peaked in mid-January 2021, and was deadlier than the first. The UK started a COVID-19 vaccination programme in early December 2020. Generalised restrictions were gradually lifted and were mostly ended by August 2021. A third wave, fuelled by the new Delta variant, began in July 2021, but the rate of deaths and hospitalisations was lower than with the first two waves – this being attributed to the mass vaccination programme. By early December 2021, the Omicron variant had arrived, and caused record infection levels.