Thousands of fireworks covered the sky above central London as the UK welcomed 2019 overnight.
More than 100,000 people lined the banks of the Thames for the ticketed event, which saw eight tonnes of fireworks set off from three barges and from the London Eye.
Even Big Ben came out of hibernation to count down to midnight, having been closed down for renovation in August 2017.
The dazzling display was centred around the theme “London is open” – with the phrase spoken in seven languages at about 12.02am.
The soundtrack featured the best European talent in what was billed as a rebuke of the “insular inward-looking” impression given of the UK in the lead-up to Brexit.
London mayor Sadiq Khan said the fireworks display was about “showing the world, while they’re watching us, that we’re going to carry on being open-minded, outward-looking, pluralistic”.
He added: “We, in my opinion, are one of the greatest cities in the world, one of the reason we are one of the greatest cities in the world is because of the contribution made by Europeans.”
“I think diversity is a strength and I think what tonight is about is celebrating that diversity.”
In Scotland, the biggest celebration was Edinburgh’s Hogmanay.
About 75,000 people gathered in the Scottish capital, counting down the 10 seconds to midnight and then watching fireworks to a soundtrack by German band Meute.
Edinburgh’s celebrations was also centred around the ties between Scotland and Europe.
Many of the performers were from the continent – and as the festival continues on New Year’s Day, buildings will be illuminated by “love letters to Europe” from six writers: Billy Letford, Chitra Ramaswamy, Kapka Kassabova, Louise Welsh, Stef Smith and William Dalrymple.
The Edinburgh event is one of the world’s largest street parties with bands, DJs, streets performers, dancers, acrobats and fire eaters performing across three stages.
Like the London fireworks, it attracts many people from continental Europe and even further afield.
Elsewhere in Scotland, Inverness hosted Scotland’s largest free Hogmanay, while celebrations also took place in cities such as Aberdeen and Stirling.
Thousands of people also watched a fireworks display in Manchester’s Albert Square. A big screen displayed the countdown to midnight before fireworks were set off from the roof of the town hall.
Meanwhile, London will host its 33rd New Year’s Day Parade later, with more than 8,000 people from around the world taking part and raising money for mayoral charities across the city.