As I understand it, legal enforcement doesn't start until October 18th. So if we sell more than 10,000 tickets, you might be asked for your vaccine passport to test our procedures (they have to spot-check "a reasonable number" of people), but they probably won't stop you getting in if you don't have it. But if we just decide to sell less than 10,000 tickets to avoid the hassle, we don't have to check anyone anyway.