Handysnaks - it's not at all clear what your motivation is (unless you're just envious), but your comments are clearly based on ignorance. If the aim of places such as the NEC is to get as many feet through the door, then why exclude feet arriving by heli? There are very many events that are far more congested than the NEC, both in terms of visitors vs. footprint (the British GP is an obvious example). I don't see any H&S or environmental issues at these? The NEC has an enormous amount of land that could easily be used to accommodate heli traffic whilst compromising neither H&S regs nor income from visitors arriving via alternative means of transport.
TTB