The UK's highest-ranking police chief said her troupe was "stretched" throughout the capital by ongoing protests from the Extinction Rebellion.
Police Commissioner Cressida Dick said many officials had been removed from other tasks. They worked for many hours and tried to monitor several protest sites.
At the end of a week full of demonstrations With more than 1,100 arrests, high-ranking commanders told Sky News they had achieved their main objective of evicting protesters from all of London's main thoroughfares.
The vast majority of protesters were transferred to an area around Trafalgar Square.
In some other places, however, there were smaller pop-up protests. including BBC Broadcasting House,
Activists barricaded the entrance to the BBC headquarters in London on Friday, with some extending the building's facade.
BBC staff said they could not enter the building as dozens of demonstrators camped outside the main entrance with banners calling on the company to end the "silence" on climate change.
Sky News was given exclusive access to one of Scotland Yard's bronze commanders, who was responsible for coordinating police operations at several locations in central London.
Chief Inspector Billy Bowen-Long said his teams had achieved the main objective of evicting protesters from Westminster and Lambeth Bridges, Whitehall, and from the Houses of Parliament.
Sky News followed the commander as he met with other high-ranking officers to see how far they had taken the activists of the Extinction Rebellion to Trafalgar Square.
The chief inspector said, "We have done a great deal of work in recent days to clear the main arteries, and we now have a camp at St. James's Park, so we have conditions under Section 14 of the Public Order Act ,
"We try to enforce these conditions by asking this group to move to Trafalgar Square, and if they do not go, we will try to enforce these conditions, and violating these conditions will be an offense for which they can be arrested . " , "
About 100 police officers went to the park and told the protesters that they needed to move or be arrested.
Within hours, many had already cleared their tents and moved out of the park toward an increasingly busy Trafalgar Square.
In the square, Chief Inspector Bowen-Long supervised the beginning of a lengthy operation to remove a small group of demonstrators from a wooden tower in the middle of the street.
A team of special officers from the Met's protest department were called in to liberate the activists who had themselves attached to the structure and chained.
The chief inspector said: "It is a real specialty, you need very specially trained officers who can do the distance to it.
"It puts them in position and makes sure there is a safe room in which they can do it, there is a lot of negotiation, and we'll just take it from there.
"When people say, why do not you just clear the streets? These are some of the challenges we face when it comes to the complexity of structures.
"We have to pay attention to the safety of the people there and make sure that they are safely abolished and not injured.
"Once they are down and open, the structure is removed and taken away.
"You will probably already be arrested because we would not work on them unless they were arrested and they had the opportunity to leave.
"If they go away, that's the end, and they can join the legal protests on the place themselves."
During this week senior officials were in close contact with the organizers of the protests, saying that they had a constructive relationship with them for the most part.
Chief Inspector Bowen-Long said: "It is this balance, the human right of protest enshrined in our law, and we are well aware that we are crossing the line between not interrupting the protest and ensuring that there is no unlawful protest ,
"When we look at individuals, we have a broad age range, from people six to seven years to 85 and 86 years old.
"That presents us with some challenges in dealing with people – a very measured response, depending on how the individual is doing."
Back in Trafalgar Square, it took almost three hours for the last protesters to be cleared of the wooden tower and the structure dismantled.
It was a painfully slow process, but it should ensure that activists are removed as safely as possible.
These operations are very resource intensive.
Like many Met policemen, more than 500 officials from across England and Wales were dismissed to help their London counterparts.
For Scotland Yard, it's about keeping the areas they evacuated and responding to more protests.
The police must maintain this staffing capacity for another week, many more days to reconsider the next step in Extinction Rebellion.