With its tax-friendly regime and seen as politically stable, Singapore has long been a haven for ultra-rich foreigners.

The global economic outlook has been heavily impacted by the war in Ukraine and slowing economic growth in China made worse due to the country's ultra-strict Covid policies and prolonged property slump.

Sunak's portfolio of properties reportedly includes a penthouse in California, an apartment in London's exclusive Kensington district and a mansion in his Yorkshire constituency in the north of England.

China does not currently have nationwide direct property taxes, and does not levy an inheritance tax.

Most megayacht owners do not want or need to go near populations in peril on the land during the pandemic.

WHO emergencies director says only one disease – smallpox – has ever been eradicated, so the availability of vaccines against Covid-19 does not mean the disease can be wiped off the face of the Earth.

The 1,000 richest people on the planet recouped their Covid-19 losses within just nine months, but it could take more than a decade for the world’s poorest to recover, says Oxfam report.