So if these are documented cases, and they have been investigated by the RSPCA, why has the RSPCA not instigated any large-scale reform?

I'm not talking about individuals on the ground, during the fair, who you say feel intimidated about interfering. I'm talking about reform at a higher level.

And if all of this is well known and documented, why did the police officer on the news report earlier in the thread refer to "one death in the past 10 years"?

With the greatest of respect, it doesn't seem to add up.