Rape kinks are definitely an extremely difficult problem when it comes to evaluating consent. The whole point of them is to fake the absence of consent, but no normal person with a rape kink will ever enjoy someone actually being raped. Other kinks with questionable consent (bondage etc.) face similar problems, going so far as depicting people causing each other real pain in a completely consensual and (in my opinion) acceptable way. Your average sex scene is difficult enough to check for consent; scenes where both parties get off to pretending to force one another to perform sex acts are impossible to ever validate.
Should such porn be banned? I don't know. Clearly there are couples out there who can live out their fantasies safely with people they trust. Looking at the statistics, it's almost shocking how common coercion, either physically or otherwise, comes up in kink prevalence lists. These topics aren't enjoyed by just the tiny minority I'd personally expect them to, and taking away their porn for theoretical possibilities of abuse seems quite extreme.
> ensuring there are custodians who’s purpose in life is to ensure workplace health and safety
I'd love that, but the fact remains that the people most vocal about these solutions are either extremely opposed to many concepts or perhaps too much into them to make clear judgement calls.
The UK has a list of topics not allowed by porn. Activities like pretend sexual abuse and role-playing as people who can't consent can be defended relatively easily, but the ban also covers spanking, caning, water sports, restraints, female ejacularion, and face sitting. If this is the type of committee that will decide the future of all porn, people like you and your girlfriend may be left disappointed quite quickly.
The government is very reactive on these topics and that usually means they're a bunch of prudes in any society.
Furthermore, a personal vetting system for porn would put a few people who will see quite a lot of porn during their work day in a position of power. That sounds like a recipe for disaster to me.