The Home Office said fake images are being used to blackmail children and force them to livestream further abuse.
An analyst who removes child sexual abuse content from the internet says she is always trying to stay "one step ahead" of the "bad guys".
Britain will make it illegal to use artificial intelligence tools that create child sexual abuse images.
The government says it is leading the way with its crackdown on AI-generated abuse images, after warnings the content was being produced at a "chilling" rate.