Police out in full force amid New Year's Eve terror attack anxieties

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New Year's Eve revellers are set to be greeted by a major police presence as they flood cities across the country to usher in 2017.

Thousands of police officers will provide a protective ring around London's set-piece firework display, while tactics have been adjusted following this year's terrorist atrocities in Europe.

Armed police will also be a fixture on the capital's Tube trains as they travel between jobs in a move that is hoped will reassure passengers. 

Fears of a mass-casualty terror plot targeting one of the country's New Year's events have heightened after lorries were used in devastating attacks on crowded areas in Nice and Berlin.

The British Transport Police (BTP) said it would also be extending the working hours of its officers on the night for a second year running.

Superintendent Andy Morgan from the BTP said: "We developed and improved our security plan for last year's New Year's Eve event following the atrocities in Paris in the previous November and we, of course, have looked at good security, a thorough security boost following a different type of threat in Nice back in July.

"In general, we have a good eyeline on what could happen, we've got very, very good assets both covert and overt deployed out within the footprint and across London, almost joined at the hip with our colleagues from the Metropolitan Police to make sure that we're working together to provide that security blanket across London."

This year's feverish countdown to midnight will also last longer than usual - an extra second - as a so-called "leap second" is introduced to compensate for a slowdown in the Earth's rotation.

When the clock eventually chimes midnight in London, a total of 12,000 fireworks will paint the night sky during the Mayor's showcase display on the banks of the Thames, watched by around 110,000 people.

Some of the stars the world lost in 2016 will be honoured during the 12-minute spectacle, as David Bowie, Prince and the Two Ronnies, which included the late Ronnie Corbett, are to feature in the soundtrack.

In Edinburgh, the world-renowned Hogmanay street party will see 80,000 punters flock to the city centre to enjoy music from The Charlatans, while Paolo Nutini fronts a concert in the gardens.

But the New Year's enthusiasm is at risk of being dampened in northern England and Wales, as rain is set to sweep across areas including Manchester, Leeds and possibly Cardiff at midnight, the Met Office said.