Myanmar's ambassador in London has spent the night in his car after saying he was locked out of his embassy.
Kyaw Zwar Minn said staff were asked to leave the building by Myanmar's military attaché on Wednesday night, and he was told he was no longer the country's representative.
British Foreign Secretary Dominic Raab has condemned the "bullying actions".
Myanmar's military seized power in a coup on 1 February, sparking weeks of protests and escalating violence.
Kyaw Zwar Minn has called for ousted leader Aung San Suu Kyi to be released.
More than 500 people - including dozens of children - have been killed so far as pro-democracy protesters demand a return to power of elected leader Ms Suu Kyi and her National League for Democracy (NLD) party.
