The leader of Newham’s Green party walked out of the borough’s full council meeting on Monday night after being repeatedly misgendered by Labour councillors.
Danny Keeling, who is non-binary, accused colleagues of discrimination following the meeting.
The Stratford Olympic Park councillor was speaking against Newham Labour’s budget plans when they were referred to as “he” by council chairman Winston Vaughan.
In his apology, Mr Vaughan again misgendered them.