The president of the Association of Chief Police Officers and a former PSNI chief constable is to step down at end of the year when the organisation is scrapped.
Sir Hugh Orde has been the Association of Chief Police Officers (Acpo) president since 2007.
His decision comes ahead of the formation of a new body representing senior officers, called the National Police Chief's Council.
According to Acpo, it will co-ordinate operational policing at national levels.
Sir Hugh said it had been an "immense privilege" to have been president of Acpo during a time of "changing modes of crime, seismic shifts in the policing landscape and the impact of austerity on the service".
He said: "I want to thank my colleagues all for their support and comradeship, along with all those others that I have served with in 37 years as an officer."
In a statement, Acpo said the new National Police Chief's Council will "help police cut crime and keep the public safe, by joining up the operational response to the most serious and strategic threats".
It will be hosted by – but will be independent of – the Metropolitan Police and a chair of the new council will be elected by the end of the year.