The Government is considering putting the National Crime Agency in charge of counter-terrorism.
It is considering a review to decide whether the NCA, which is directly answerable to the home secretary, should take over leading on counter-terrorism from the police.
The police service is expected to vigorously resist the change and argue that the current system is the “most effective way of countering the threat” of terrorism.
The Met currently leads on counter-terrorism operations for the police, with a series of regional units run by other forces contributing intelligence and making arrests.
Police say the counter-terrorism hubs around the country, known as “the network”, are running at an intense level, making nearly one arrest a day.