The Royal Variety Performance is set to go ahead as planned following an incident at Oxford Circus which armed police responded to.
Members of the audience are being let into the venue slowly, although there will likely be a delay in proceedings.
Kensington Palace has confirmed that the Duke and Duchess of Cambridge are still due to attend the performance at the London Palladium, but their arrival will be postponed slightly.
At 16:38, police were called to reports of shots being fired on Oxford Street and on the Oxford Circus tube station.
Police responded to the incident as if it was terror-related, although it now appears to have been a false alarm.
The Met warned people to stay inside and take cover in buildings until further notice.
One woman is reported to have suffered minor injuries.
Royal photographers were at the scene awaiting the arrival of the Duke and Duchess of Cambridge. Some took to Twitter, reporting that they had been locked in coffee shops and restaurants.
The speed of the emergency services was extremely fast, and following the initial 999 calls, it took just over an hour for police to declare the incident as a false alarm.
There were concerns that the Royal Variety Performance would be cancelled if Oxford Circus remained closed because members of the audience would not have been able to access the Palladium.