How Do We Know That Official Covid Deaths Were Overestimated?

In the two-month period from March to April of 2021, more than 4,000 Covid deaths were recorded in England. Yet excess mortality was negative.
Rubin Report / Daily ScepticIn the two-month period from March to April of 2021, more than 4,000 Covid deaths were recorded in England. Yet excess mortality was negative.
Rubin Report / Daily Sceptic