Notting Hill Carnival will have knife arches installed along its route for the first time ever following a spike in violent crime in the capital.

Metropolitan Police hope the walk through metal detectors, which pick up on people carrying blades, will help reassure revellers it's safe to attend.

The arches will be placed at "strategic points" (Met Police wouldn't reveal exactly where) along the Kensington street party's route which which will be policed by the highest number of officers in six years.

It is hoped the "tried and tested" method will put off people planning to arm themselves with knives and offensive weapons but not everybody will be expected to pass through them, according to the Met.

Superintendent Elisabeth Chapple, Met spokeswoman on the carnival, said: "We want people to come to the carnival to enjoy themselves and therefore we want to reassure people there is a significant policing plan in place working in support of the organisers to help them do that.

"One thing they may see that is a little different is that we are using knife arches.

"We understand the views of the community around the levels of youth and other violence using knives on our streets and we want to reassure them that it is safe to come to carnival.

"There has been knife crime this year, as in previous years, and we understand the community are concerned about that.

"When we were planning for Notting Hill alongside the organisers we wanted to make sure we had the fullest range of police tactics to reassure the Londoners that carnival is safe to come to."

Notting Hill Carnival attracts thousands of revellers every year

She said they will be placed in the street and "people flow through them", adding: "We won't be specifically selecting people to go through them. They are designed to go with the crowd flow and detect any people who would think of bringing a knife to carnival."

Using the knife arches is part of a wide-ranging "belt and braces" approach to try and make carnival safe, according to Notting Hill Carnival Limited executive director Matthew Phillip.

He said: "London as a whole and the UK is operating under a backdrop of knife crime, and we are working to have a safe carnival. The introduction of the knife arches is one thing we have as we to try to do that.

"There have been so many other events that have this. Notting Hill Carnival is very different because it takes place on the streets. We will have even more eyes and ears on the ground from the community as well as police, and I think that will help to make sure people feel safe and to identify people who come to wrong.

"Most people who come to carnival come to enjoy themselves, and we want that spirit of safety and unity."

Some 13,000 officers will be deployed to the two-day event - around 450 more than last year and more than the parades over the past five years.

Almost 7,000 officers, some from the Metropolitan Police's newly formed Violent Crime Task Force, will be policing Monday's event to "combat the threat of violent crime."

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This will be up from 6,100 on-duty officers on Sunday's less busy family day.

Undercover police officers as well as officers from the force firearms and dog unit will be in place.

The event is expected to attract more than one million revellers to its floats, food stalls and music.

The music is set to stop for a 72-second silence in tribute to the 72 people who died following the fire at Grenfell Tower in June 2017.

The tower block is within half-a-mile of the parade route.

Partygoers are advised to plan their journeys ahead, avoid bringing valuables and not carry too much cash.

Supt Chapple added: "There are no specific threats to carnival this year but we continue to review the policing plan in relation to it.

"We are aware that in previous years there have been a number of incidents but compared with the number of people coming to carnival the number of incidents isn't significant, but any incident that does affect Londoners we want to provide reassurance."

Commander Dave Musker, police gold commander for the event, said: "The Met seeks to support Notting Hill Carnival Ltd, carnivalists and local communities to deliver a safe and spectacular event over the bank holiday weekend.

"Our continued major effort directed against violence across the capital will continue."

He added: "Let no-one be in any doubt that if you have the intention to come to carnival and be involved in crime or violence, my officers will robustly and proactively target you to keep Londoners safe."