Concerns have been raised about the future of Britain's troubled inquiry into child sex abuse after its third head resigned.
Dame Lowell Goddard resigned on Thursday, havign been appointed chair of the long-delayed inquiry in February 2015.
Matthew Reed, chief executive of The Children's Society, said: "The crucial work of the independent inquiry into child sexual abuse must not be derailed by the departure of the chair. For the sake of victims of abuse, it is important that progress is made quickly to appoint a new chair.
"However, there have now been three chairs appointed since the inquiry was first announced. Given this, it is equally important to ensure the new chair is the right person for the task ahead."
A National Society for the Prevention of Cruelty to Children spokesman said: "It is essential that the inquiry continues with minimum disruption and a replacement chair is found urgently. Victims and survivors have already waited too long to have their voices heard and for the abuse they suffered as children to be acknowledged and believed."
An overview of the 13 investigations to be carried out by Britain's beleaguered child abuse inquiry.
One abuse survivor told ITV News that he felt "let down" by yet another resignation.
Dame Lowell Goddard has left her role as head of the Independent Inquiry into Child Sexual Abuse. She was the third person to hold the role.