Unfortunately due to the way the graphs on this page are generated, they don't look great on smaller screens. You may have better luck rotating your device to a landscape orientation.
This page shows more detail on the testing system in the UK, focusing on antigen swab tests — "pillars" 1 and 2 in the government's terminology. Further graphs on testing are available on coronavirus.data.gov.uk.
This plot shows the "test positivity" — how many tests were positive, based on the date the results were reported:
This plot shows the percentage of available testing capacity which was being used:
|Public Health England||Coronavirus (COVID-19) in the UK||2021-05-16|