Qualifying events under Martyn's Law
A qualifying event is in scope only where 800 or more people may reasonably be expected present at the same time and there are entry controls such as tickets or checks. There is no standard tier for events, and the rules do not apply where the premises is already enhanced duty premises.
Events are not premises
The Act treats a qualifying event separately from qualifying premises. The thresholds and the duties are not the same, so do not assume the premises answer carries across.
The event rules exist to catch things happening at places that would not otherwise be in scope — a festival in a field, an event in a park.
800 or more, with entry controls
Two conditions. 800 or more individuals may reasonably be expected present at the same time, and access is controlled — by ticket, invitation, membership or a check on the way in.
An open event with free unchecked access does not meet the second condition however many people attend.
There is no standard tier for events
Below 800, an event is not a qualifying event at all. There is no lower tier of event duties.
That makes the event question more binary than the premises question.
Not where the premises is already enhanced
The event duties do not apply where the event takes place at premises that are already enhanced duty premises. The premises duties cover it.
So a concert in a 2,000-capacity arena is dealt with as premises, while the same concert in a park is dealt with as an event.
Enter your premises and expected occupancy. You get the tier for each site and the reasoning behind it. Free, no account.