There is a legal limit and it can be tested in a court. The current sound level is a fashion and has been measured at Bromyard to be above the legal limit.

Are you accusing Graham Bradshaw (posted above) of breaking the law? If you say things like that you really ought to a) understand what you're talking about and b) have some evidence to back it up.

As Graham stated above, the sound level limits are to do with the levels at the edges of the site to stop it reaching residential areas.

The simple test for sound level is the fact that they get feedback during performances, turn it down and the feedback vanishes. Simples.

Complete rubbish - feedback is rarely caused by the front of house speakers being too loud, but the monitors not being EQed or rung out properly or things simply shifting out of the alignment from which they were rung out in the soundcheck.

You can state your opinion on what you consider to be too loud (and accept that some people will disagree), but don't try to dress it up with what is legal or not unless you understand what you're talking about.