Former PM Boris Johnson has confirmed he will attend the COP27 climate conference in Egypt next week after being invited by the organisers.
His successor at No 10 Rishi Sunak has been under pressure to attend, after initially saying he was too busy preparing for the budget.
But it now looks increasingly likely that Mr Sunak will go after all.
His official spokesman said “significant progress” was being made on the financial statement.
No 10 said it would provide an update if Mr Sunak’s travel plans change.
The 27th meeting of the Conference Of the Parties (COP) due start in Sharm El-Sheikh on Sunday.