“Asked why Operation Cerrar was not made public, a police source said: ‘We need to be very clear that we always carefully consider when and what information to release in relation to ongoing investigations to protect vulnerable victims and the integrity of the inquiry.'”

Sure. If that were true, no arrests would ever be announced. It is much more likely that this was kept secret to avoid offending that most easily offended of communities, the one that, in order to appease, UK police ignored this activity for decades.

“VILE GANG Police Scotland took down large-scale asylum seeker grooming gang in Glasgow – but kept it secret,” by Blair Meikle, Scottish Sun, January 27, 2020: