PM Boris Johnson speaks at speaks at daily coronavirus press conference

The video discusses the UK's progress in meeting two key tests for managing COVID-19. The second test, a sustained decline in daily deaths, has been met with a decrease from a peak of 943 to 256. The third test, a reduction in infection rates, is also being met, with new cases dropping from 5066 to 2312. The government is satisfied with the progress, and further insights on infection measurement methods are provided.

What does the government require to be satisfied that the third test is being met?

What role does Sir Patrick play in the context of the information provided?