The Met said it was called after reports of crushing at the entrance.
“A small fire on the site, near to the entrance, had required the gates to be closed temporarily. A crowd built up and surged when the gates were reopened.
“Officers responded quickly, and working alongside event organisers, they formed a barrier between the surging crowds and people on the floor.”
Officers, the force said, gave initial medical care, including cardiopulmonary resuscitation (CPR).
“A total of 23 people received some form of assistance either from the emergency services or the event medical team, with nine people assessed by the London Ambulance Service.
“Three were taken to hospital, where their condition was confirmed as non-life-threatening.
“The event was ended early, and crowds left without further incident.”
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