The publicist Max Clifford has spoken out against allegations of sexual abuse relating to the 1970s calling them "damaging and totally untrue".
Clifford, 69, from Surrey, was arrested at 7.40am on suspicion of sexual offences and was questioned at Belgravia police station for much of the day.
Police said in a statement that a man from Surrey arrested this morning had been bailed to appear at a later date, adding: "We are not prepared to discuss further."
ITV News' correspondent Geraint Vincent reports:
Warning: This report contains flash photography from the start.
Speaking on the steps outside the police station, he said:
Scotland Yard said a man in his 60s was arrested as part of Operation Yewtree - the investigation into allegations of sex abuse surrounding Jimmy Savile and others.
The arrest is not believed to be related to any claims involving Savile.
Mr Clifford said that the allegations relate to 1977 but refused to comment on who may have brought them.
An earlier statement from the Metropolitan Police said:
Max Clifford's lawyer Charlotte Harris said he would assist the police "as best he can with their inquiries" following his arrest.
A statement said: