A writer who was at London's Apollo Theatre when the ceiling collapsed said he saw "a lot of kids traumatised, covered in dust and blood being comforted by parents".
The Independent features writer Simon Usborne told Daybreak: "There were screams, it was immediately clear something serious had happened.
"Nobody told anyone to move - everybody rose immediately and ran to the nearest exit".
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The Prince of Wales is expected to be named a future head of the 53-nation body after receiving a public endorsement from the Queen.
Heavy artillery and airstrikes have been used to pummel Yarmouk, ITV News correspondent Dan Rivers reports.
The chief medical officer for England told ITV News that misuse of antibiotics must be curbed, and new ones must be developed.