Are you talking about actual rapes or simulated rape? Of course theres no argument that any images/video of actual rapes should be treated in the same category as child abuse images.
On the topic of simulated rape, I'm not so sure. First, the evidence is inconclusive as to whether it actually has an effect on human behaviour, secondly I do wonder where the threshold between kinky/hardcore/bdsm sex and "rape simulation" lies (very much a grey area that seems impossible to police IMO), and thirdly if we go down that route why stop with rape videos? How about we ban all violent video games to stop gun and knife crime? How about music which normalises self harm?
I assume they're going to ban the movie Irreversible too? If not, why can film companies do what porn producers can't?
If they do ban it, they should prepare for being pelted with couscous at demonstrations by art film fans.