When an incident has occured it's important to identify anyone who might be affected by the event and make sure that they are safe.
Incident makes it easy to aggregate all affected parties and manage the incident.
If there is an attack in London administrators can search for anyone who as based at a UK or London office, using the LONDON or UK office tag.
They can also find travellers currently in the vicinity of the event as well as travellers will be arriving in the immediate to near future.
Administrators can get a complete picture of the current status of each individual.