The PM will be notably missing from the COP27 leaders summit in Egypt early next week. Chris Bowen, minister for climate change and energy, will represent Australia later in the conference.
Shakespeare often portrayed crises of legitimacy and reflected on the politics of his day but the Tories might not fare so well in a modern production.
Sunak is the first person of colour to take the top post. But he faces a host of problems at home, as well as a Conservative Party tearing itself apart.
Garret Martin, American University School of International Service
Only months into the job, Prime Minister Liz Truss is on her way out already, leaving her government in search of a new leader and a way to regain public trust.
Criticised for being out of touch, the former chancellor showed more authenticity than his rival, according to a computerised text analysis of a recent hustings.