The UK has finally started adding the number of COVID-19 deaths in care homes to their daily reporting. As a result, the number of deaths to date (26,097) jumped ahead of the same figure for France (24,087) who had started reporting the two figures since early April.

The Economist came up with a report tracking "excess deaths across countries". Their conclusion:
Official covid-19 death tolls still under-count the true number of fatalities

They also compared the excess mortality with the reported COVID-19 deaths by each country's authorities.

But how accurate, or not, is each country's official numbers? Their estimates:

In Italy, "the official numbers captured 48% of the true estimated excess."

In Spain, "the official numbers captured 67% of the estimated excess."

In France, "the official numbers captured 86% of the estimated excess."

In Britain, "the official numbers captured 71% of the estimated excess."

In the Netherlands, "the official numbers captured 48% of the estimated excess."

In Sweden, "the official numbers captured 90% of the estimated excess."

In Belgium, "the official numbers captured 93% of the estimated excess."

In Austria, "the official numbers captured 57% of the estimated excess."