oris Johnson has said he is “feeling well” after a minor operation at a London hospital, No10 said.
The Prime Minister is due to take meetings on Monday afternoon, just hours after he underwent a minor operation under general anaesthetic on his sinuses.
The Prime Minister’s official spokesman said the operation took place at an NHS hospital.
He was not able to say whether Mr Johnson had been on a waiting list or how long he had waited for the operation.
He said: “The Prime Minister this morning had a very minor routine operation related to his sinuses.
“He went to hospital around 6am and the operation was carried out first thing this morning. He was back in Downing Street shortly after 10am.”
Mr Johnson is understood to have been under general anaesthetic for a “relative brief period of time”.
His spokesman explained the “standard process”, for when the Prime Minister is so incapacitated, is for the Deputy Prime Minister to stand in to take any urgent, “significant” decisions if necessary.
The operation is said to have been “scheduled for a while”.
Mr Johnson was said to be resting on Monday and to be planning to chair Cabinet on Tuesday.
He was expected also to be well enough to fly to Rwanda later this month for a Commonwealth summit.
The spokesman declined to give more details of the operation or to go more into the Prime Minister’s medical history.
Mr Johnson was driven to the hospital, rather than going by ambulance.
“He is back, he is resting currently,” No10 added, with the operation having been a “success”.
The operation is not believed to be related to him having previously got Covid.
The Prime Minister was admitted to intensive care at St Thomas’ Hospital in London in April 2020 after being hard hit by the virus.
Mr Johnson is not the first Prime Minister to have an operation while in Downing Street.
Tony Blair had treatment in the autumn of 2004 to correct an irregular heartbeat.
He underwent a procedure at London’s Hammersmith hospital called a catheter ablation – a simple technique involving a wire being inserted through veins into the heart cavity allowing doctors to “map” the rhythm disorder.