You may not notice much EHO action but the pub already holds a premises licence and when I held a premises licence for a local meadow the EHO/LO was across the event like a rash. The fire officer was more marginally involved but my getting the local brigade to do their exploding chip pan demo and provide their river rescue display ticked all his boxes.
Doing community festivals we had fire fighting kit, security barriers, first aid kits and mini versions of everything Glasto has including RA's and event manuals for those with more than about 1,000 attendees. The fire RA is, like all of them, a legal requirement. Even those events funded and equipped by the local council often saw LO and EHO inspections.