The City of London Corporation on Thursday revoked an honour granted to Aung San Suu Kyi over the treatment of minority Rohinghya Muslims in Myanmar.

Elected representatives on the body that runs London's historic centre and financial district voted to revoke the freedom of the city granted to Suu Kyi three years ago.

The move followed her appearance, as Myanmar's civilian leader, at The International Court of Justice in The Hague to personally defend her country against allegations of rape, arson and mass killings against Rohinghya victims.

"Today's unprecedented decision reflects the City Corporation's condemnation of the humanitarian abuses carried out in Myanmar," said David Wootton, chair of the committee that deals with Honorary Freedoms.

"The argument for the removal of the award had been much strengthened by Aung San Suu Kyi's close association with Myanmar's government at the (Hague) hearing, as well as her lack of response" to the committee's letters.

Suu Kyi was originally awarded the honour, which dates back to 1237, in May 2017 in recognition of her "non-violent struggle over many years for democracy and her steadfast dedication to create a society where people can live in peace, security and freedom".

She attended the award ceremony herself, during a tour of Europe, but faced protests even then at the plight of the Rohingya. Previous recipients of the honour include Britain's wartime leader Winston Churchill, anti-apartheid leader Nelson Mandela and scientist Stephen Hawking.