I think it's pure economics. Everything is going up so there is a knock on effect everywhere.
Our local school always had a Marquee for it's summer fair but this year the cost had risen to such an extent that they had to cancel it. The provider listed cost increases in fuel, vehicle insurance, liability insurance and employee insurance.
When you consider the amount of Marquees, employees and vehicles involved in just setting up a show???????
The thing is that the organisers know that people that really want to go will pay the price, as I do, I have to agree with Niel82 though , Flask and