Do bus operators get consulted when local authorities decide whether to offer a licence to a major event? (In an ideal world, someone like Transport Focus would also be consulted, and make appropriate representations - but as far as I can tell, they mostly just write things down and put them in filing cabinets).
Modest delays to those not attending an event must be considered unavoidable collateral damage, I guess - and it is reasonable to expect people to plan journeys to accommodate a bit of delay. But how much delay is it reasonable to expect people to cope with? Nobody times their journey, even to an exam, hospital appointment, wedding, funeral, or flight to accommodate a delay of four or five hours.
At some point, surely someone should say No to licensing of an event with arrangements that can reasonably be anticipated to see innocent people delayed for several hours.