More information about SP2019 arena size

[WillB97]

It's worth noting that the space issue was due to a combination of increasing the arena to 8.4m and the decision to add a crowd barrier around the outside which meant the space occupied was approximately 10m x10m.

kb/docs/events/history/2019.md

Lines 87 to 88 in 8510251

	- It took up a lot of space and we were very close on the Fire Regulations limit.
	- It was assessed at 120 people capacity.