You asked
I request the number of UK Covid-19 positive individuals by ethnic group.
We said
Thank you for your request.
In order to provide the number of confirmed cases of coronavirus by ethnicity from the COVID-19 Infection survey we would need to create bespoke analysis. Under the Freedom of Information Act 2000, Public Authorities are not obligated to create information in order to respond to requests. We therefore consider this to be information not held.
However, we have published odds ratios of positivity rates by ethnic group via the following link, which may be of interest to you: Coronavirus (COVID-19) Infection Survey: characteristics of people testing positive for COVID-19 in England and antibody data for the UK: December 2020.