Cabinet Office minister Michael Gove said in an interview with the BBC that the Prime Minister was “not on a ventilator” but had “received oxygen support.”
He told BBC Radio 4’s Today program that Johnson was “receiving the very best care” at St. Thomas’ Hospital in London, after being taken into intensive care at 7 p.m. local time (2 p.m. ET) on Monday.
“And of course, one of the reasons for being in intensive care is to make sure that whatever support the medical team consider to be appropriate can be provided,” he said.
Johnson’s hospitalization has highlighted the lack of a formal line of succession in the UK government. Johnson nominated the Foreign Secretary, Dominic Raab, who also holds the title of First Secretary of State, to deputize for him “where necessary.”
Few formal powers are invested specifically in the UK prime minister and key decisions are taken collectively by the Cabinet or its sub-committees. Many statutory powers are held by individual secretaries of state. But in recent decades, holders of the UK’s top political office have adopted a more presidential style, and the sweeping nature of the ruling Conservative Party’s most recent election victory was attributed to Johnson’s personal appeal with voters.

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“The Prime Minister has a team around him who ensure the work of government goes on,” Gove told the BBC. He said Johnson had a “stripped-back diary” last week to make sure he could follow the medical advice of his doctors.
But Gove sidestepped a question about who held the “nuclear codes,” saying he would not discuss national security issues.
Conservative MP Tobias Ellwood, who chairs the House of Commons defense select committee, tweeted good wishes to Johnson but added: “It is important to have 100% clarity as to where responsibility for UK national security decisions now lies. We must anticipate adversaries attempting to exploit any perceived weakness.”
Gove told Sky News on Tuesday morning that Cabinet ministers were not told about the Prime Minister’s deteriorating condition until nearly an hour after Johnson was taken into intensive care.
Asked whether the government had been up front with the public about Johnson’s condition, and whether the Cabinet had been taken by surprise, he replied: “Yes we were. The [daily coronavirus] briefing that was given at 5 o’clock was given at a time when we didn’t know about the deterioration in the Prime Minister’s condition.”
“We were informed subsequently. The Prime Minister was admitted to intensive care at 7 o’clock, and that information wasn’t given to us in government — to those in the cabinet — until just before 8 o’clock.”