A ring of steel has been erected on the city’s streets with 250,000 people expected to flock to landmarks including Trafalgar Square, the Southbank and Waterloo Bridge, to enjoy the fireworks tonight.
Fences have been reinforced with metal barriers along the Embankment and vehicle obstacles have been set up around bridges.
Undercover officers will also be mixing with the crowds as police monitor the celebrations.
The precautions are in light of the four terrorist attacks in the city this year, with horrific incidents in Westminster, in March, and London Bridge, in June.
There were similar precautions taken at Christmas markets across the country, with anti-vehicle barriers and steel fences set up to ensure shoppers were kept safe.
Organisers and police increased security over fears of an attack similar to the one at a Christmas market in Berlin in December 2016.
However, while security measures are ramped up in the capital to ensure the public are safe, Scotland Yard has admitted there will be fewer officers on the ground this year.
Police officer numbers across the country are at their lowest level for 30 years, despite the current UK terror threat level set at severe.
Metropolitan Police Superintendent Nick Aldworth said: “We are providing a proportionate number of officers based on the threat, number of people coming, and the secure environment we’ve been able to build.”
Aldworth said the public should be ‘reassured’ by the number of officers available.
“I think the message I would give to the public is to be reassured that we’ve got the right number of officers to police this event,” he said.
“We want them (the public) to be alert, not alarmed.”