Earlier, Culture Secretary Lisa Nandy said: “Neither the prime minister nor the home secretary, nor the mayor of London has the power to override the police on this matter. It is an operational decision for the police.
“They can put their own view. That’s certainly the case.
“But you would expect the home secretary and the mayor of the city where this event is taking place, given the history of what had just happened in Vienna, to be involved in the conversation about security arrangements.”
A spokesperson for the Metropolitan Police said the force was “operationally independent”.
“Our decision-making is based on a thorough assessment of threat, risk and harm and the circumstances of each case,” the spokesperson said.
The force added it would not comment on specific details of security arrangements.
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