The sound of Big Ben chiming at midnight ushered in the new year for thousands of people who gathered in central London.
The centrepiece of the London celebrations was a dazzling midnight fireworks display around the London Eye.
A fireworks display over Edinburgh Castle was one of the highlights of the city's four-day Hogmanay celebrations.
Police said about 200,000 people thronged the centre of London for the occasion - 50,000 more than last year.
Many in London described the party as "fantastic".
Thousands of people nationwide enjoyed a few drinks as part of their celebrations.
In London, celebrations began with images of sporting and other heroes projected onto buildings.
A couple kissing were among those who took to the streets of London, despite a Tube strike which failed to create the havoc that had been widely expected.