I don't think that's the point of plea bargaining, but plea bargaining is an American thing and we don't have it in England.
Waiting for a case to make its way to court would take far too long. Police will search through seized evidence and immediately start trying to identify the children in the images; working out if the images are new; and working out where the images were created.
They'd also want to see if there are any images of abusers in there too, and if those abusers are already known to police, and if those abusers are the same person as the alleged possessor of images of child sexual abuse currently being detained by police.
Waiting for a case to make its way to court would take far too long. Police will search through seized evidence and immediately start trying to identify the children in the images; working out if the images are new; and working out where the images were created.
They'd also want to see if there are any images of abusers in there too, and if those abusers are already known to police, and if those abusers are the same person as the alleged possessor of images of child sexual abuse currently being detained by police.