Fighting robotics, I would argue, is a sport in the sense that it is highly organised, has the same type of rules and structure in place as you would football or cricket or whichever traditional sport you care to mention and is competitive. An event like this, where you had to register beforehand, walk-ins are not permitted, strict hygiene requirements are being enforced and contact information collected well in advance of the event itself should qualify as "organised" at the very least.

And yet you make a good point about the numbers and the expectation. This is why it is a "grey area" for me and that is why I am making the call only after I've seen the announcement by the government at 16:00 BST today and the actual law bill in PDF format. I also get the basic premise and idea behind this restriction being (re)introduced.