Start a conversation
Request Emergency Assistance
Telephone rather than write, and have ready the site address, a short description of the incident, which part of the building is involved and a number we can ring you back on. Say whether things are getting worse, and what the effect is on the people there, on site security and on whether the premises can stay in use.

Keep everyone away from danger
Where life is at risk right now, the emergency services come first. Put the building's emergency plan into effect and clear the affected zone. Nobody should try an unfamiliar isolation or repair, least of all to get a photograph.
Agreeing the next step
What can be agreed depends on the urgency, whether the site can be reached, what has failed and what is to hand. Making safe for now and repairing properly can be separate jobs, so say which you need.
Your information at this stage
The privacy and business information still applies. Give what lets someone act on the fault and nothing more; confidential property or personal records belong on an agreed route.
Other related help
Anything less urgent should go through another contact us route; see also services and practical guidance.