Three people have been hurt after part of the set at the Camden Roundhouse collapsed onto the audience during a live acrobatics show last night.
The London Ambulance service were called to the venue just before 8 o'clock, half an hour into the performance.
Toby Sadler has the details.
More top news
"Three were standing together almost shoulder-to-shoulder in like a little wolf pack and they're staring at me...", said PC Wayne Marques.
Her nails had curled around three times before embedding in her pads.
The death toll from the Grenfell Tower fire is currently believed to be around 80 people, the vast majority of whom were from just 23 flats.