The Child Exploitation and Online Protection Centre is dedicated to eradicating the sexual abuse of children. They are part of UK policing and very much about tracking and bringing offenders to account. More about the work they do here.
More top news
Police have set up an emergency helpline for those concerned about loved ones - 0161 856 9400
Friends and family have mount appeals on social media for news of people missing after an Ariana Grande concert hit by a fatal explosion.
Emmerdale star Isabel Hodgins, who plays Victoria Sugden in the soap was caught up in the Manchester Arena attack.