Broadcaster Janet Street-Porter has "completely denied" claims that she racially abused a neighbour.
Ms Street-Porter is a former editor of the Independent on Sunday
Street-Porter, 59, a former newspaper editor and regular face on TV, was questioned after attending a north London police station by appointment.
In a statement she said: "Anyone who is aware of my track record in journalism and the media knows my strong anti-racist views."
A Scotland Yard spokeswoman said she was bailed pending further enquires.
In a statement, her law firm Harbottle & Lewis said she: "completely denied the allegation and expects to be fully vindicated in due course."
She was head of youth and entertainment features at the BBC in the 1980s, and appeared on ITV1's I'm A Celebrity in 2004.
A Scotland Yard spokesman said: "On 16 January, a 59-year-old woman attended a north London police station by appointment and was arrested in connection with an alleged racially aggravated public order offence.
"She was later bailed to return in February pending further inquiries."
Ms Street-Porter is vice-president of the Ramblers' Association and is a fellow of the Royal Television Society.