Fireworks: Public Sales

Has there been any investigation of the issue of inspections by trading standards, as opposed to by the Health and Safety Executive? Two people lost their lives in a firework explosion in my constituency a few years ago, and it was implied that although trading standards are allowed to inspect places where up to 2 tonnes of fireworks are kept, they did not have enough expertise to deal with an amount of explosive that was greater than that which Guy Fawkes used in these Houses of Parliament. Would it not be better for the Health and Safety Executive to come in at a much lower level than 2 tonnes, which I believe is the law at the moment?