[nirv]

Apparently, The Telegraph[1] provides a bit more context with links to details[2].

Upd: BBC also updates on this subject[3] now, the facts will come later ("Investigation launched into coronavirus test error").

[1] https://www.telegraph.co.uk/technology/2020/10/05/excel-erro...

[2] https://twitter.com/standupmaths/status/1313055411285774336

[3] https://www.bbc.com/news/uk-54422505

[rich_sasha]

Saw it too now, thanks for the sources!