The discovery of the Omicron variant (B.1.1.529) led to new travel restrictions imposed by the UK, though there are already reports of cases caused by Omicron in the country (Guardian, BBC, UK Health Security Agency - Technical briefing). The outcome will be determined by total confirmed and probable case data from UK Health Security Agency, published weekly here: https://www.gov.uk/government/publications/covid-19-variants-genomically-confirmed-case-numbers. For example, as of 24 November 2021, there were 1,370,519 confirmed and probable cases of the Delta variant (Variants: distribution of case data - 26 November 2021). The question would close, if not before, upon the release of data up to 23 March 2022, which is expected on 25 March 2022.

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The question closed "Before 30 December 2021" with a closing date of 23 December 2021.

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