The reason there are so few circus disasters is easy, they are probably the most inspected entertainments in the UK. Almost every time they move pitch the H&S inspector turns up at the new venue, and puts them through the wringer. There is nothing wrong with this, and public safety is top priority. The PEL however is another, and separate burden, which is nothing to do with safety, public or otherwise. It is another New Labour infringement of public liberty.
John