Seventy-nine people were injured after the ceiling collapsed at the Apollo Theatre on Shaftesbury Avenue last night, a London Ambulance Service spokesperson said.
"By the time the scene had been completely cleared, we had treated 79 patients," the spokesperson said.
Of those patients, nine were seriously injured, they added.
The London Ambulance Service has tweeted that members of its hazardous area response team remain on standby at The Shard. They were reportedly called to the protest at 4.40am this morning.
The three nine-year-old cricketers, Lewis Gaston, Aidan Oakley and George Robert, who were hurt when a tree fell at Spencer Cricket Club, sustained their injuries as they waited to use practice nets.
Aidan has been discharged from hospital while Lewis and George remain under close observation, the club said.
Three nine-year-old boys who were injured when a tree fell at Spencer Cricket Club in Earlsfield, south west London on Saturday 16th June, have been named by the club as Lewis Gaston, Aidan Oakley and George Roberts.
The scene at Spencer Cricket Club in Earlsfield, south west London where two nine-year-old boys were left with serious head injuries when the tree fell on them while they waited to use the practice nets. A third boy received leg injuries and is also being treated in hospital.
The uprooted tree remained lying across the cricket pitch this evening.
An eyewitness heard the tree fall that hospitalised three nine-year-old boys today. Monique Wilkinson, 33, was staging a birthday party for her three-year-old daughter at the time.
All cricket has been suspended at the sports club where two nine-year-old boys were left with serious head injuries when a tree fell on them as they waited to practice.
Another nine-year-old boy suffered leg injuries when the tree fell as they waited to use the practice nets at Spencer Cricket Club in Earlsfield, south west London. A statement from the club said:
Charlie Masson-Smith, from Wandsworth Council, said the wind was very strong today and could have knocked down a healthy tree, leading to the 'terrible accident' that has injured 3 9-year-old boys.
Two nine-year-old boys have suffered serious head injuries and a third suffered leg injuries after a tree fell at Spencer Cricket Ground in Fieldview, Earlsfield, south London, the London Ambulance Service said.
The boys were waiting for a turn in the cricket nets when the accident happened, a Metropolitan Police spokesman said.
The spokesman said: "We were alerted by the ambulance service at 16.04 that a tree had fallen on children at Spencer cricket ground.
"The boys were waiting for a turn in the nets when the tree fell.
"Three boys were taken to St George's Hospital in Tooting. Two had injuries and were in a serious condition. The third had leg injuries and was described as walking wounded.
"Wandsworth Council has been informed and attended."