Note that this is their first Expo.
I've written often about the nexus between emergency management and other disciplines, e.g., risk management, information technology, security. This International Disaster Response Expo in London, has aligned themselves with a security expo, "The event is also co-located alongside the award winning International Security Expo (ISE) which attracts over 12,500 professionals."
Security types might not immediately see the connection (many being former law enforcement :), since I was a director of security at the Port of Tacoma for four years, I can see the connections immediately!
So if you looking for a reason to go to London in November ...