Boris Johnson, the ousted prime minister who led Britain through the pandemic, is expected to testify before an official inquiry on Wednesday. This will be his first detailed public account of how he dealt with Covid-19 and his government’s handling of the virus and its impact. Johnson will face questions about whether he should have imposed a lockdown sooner, how seriously he took the virus, and whether he understood the data regarding its spread. He has had some victories, such as the fast vaccine rollout and the successful reopening of the British economy. However, his overall performance has been criticized and has been described as unsteady, erratic, and irresponsible by several key figures. Mr. Johnson is not the only government official who has been questioned during the inquiry, but he is expected to face intense scrutiny due to his charismatic personality and political position.