There are two situation
1. If you want to run this entire exhibition in your company’s name then there are no requirements to pay taxes there.
2. If going to take this in your name then you need to pay tax there.
If you want more information about this topic you can read this blog: https://theangeltrust.com/pros-and-cons-of-registered-company-in-the-uk-or-eu-after-1-feb-2021/