Nick Harding from London Fire Brigade said the audience at the Apollo Theatre were walking around in a dazed condition after the ceiling collapsed.
The Kingsland Fire Station manager said, "People were in a lot of shock ... a lot of them had head injuries and other injuries so it was quite a confused scene."
More top news
Europe's largest bank had earlier warned it was considering relocating over fears of stricter regulation.
Expect it to be bitterly cold in the biting wind chill.
It was DiCaprio's night as he won best actor for The Revenant, which swept the board with best film and best director gongs