Myanmar’s ambassador in London told Reuters he was expelled from the embassy on Wednesday, and sources said his deputy had locked him outside the building and taken responsibility for the military.
The military seized power in Myanmar in a coup in February and has defeated democratic protesters.
London Ambassador Kyaw Zwar Minn has broken lines with the ruling junta in recent weeks and called for the release of interned civilian leader Aung San Suu Kyi.
“I have been banned,” he told Reuters outside the embassy in central London.
Four diplomatic sources with knowledge of the matter said that Deputy Ambassador Chit Win has taken over as head of affairs and he and the military attaché had locked the ambassador out of the building.
Kyaw Zwar Minn spoke next to the embassy, where the police were on duty. He was talking to protesters on the street outside.
Last month, he called for Suu Kyi’s release and dismissed President Win Myint and praised his “courage” from British Foreign Secretary Dominic Raab.
Britain has sanctioned members of Myanmar’s military and some of its business interests in the wake of the coup and has called for the restoration of democracy.
The British Foreign Office had no immediate comment on the incident.
“We are aware of a protest outside the Myanmar Embassy in Mayfair, London. Public chairman is present. There have been no arrests, police said in a statement.