number of days since it was last legal for me to visit anyone in their own home^[1]

...

number of days since businesses were last open as normal^[2]

...

"just a few weeks to flatten the curve"

[1] Household mixing restrictions
Oct 17 2020 https://www.bbc.com/news/uk-54551596
Nov 05 2020 https://www.gov.uk/guidance/new-n...
Dec 02 2020 https://www.bbc.com/news/uk-engla...
Jan 05 2021 https://www.gov.uk/guidance/natio...

[2] Business restrictions
Mar 23 2020 https://www.gov.uk/government/spe...

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