But in fairness to
GNAS they have to satisfy the insurer...... "Oh yeah, and the insurance is also to cover members of the public having a go..." Gulp. In terms of controlling the risk of an accident, one control measure is to have competent people under competent supervision. If you don't have that you have to do something else to control the risk. Such is life if you want insurance......
BTW, that's not comment on rights and wrongs of this- just accepting that in the increasingly litigious world in which we live such is often necessary.
P.