Clean-up crews spruced up London as the capital nursed its new year hangover ahead of more celebrations.

Thousands of people gathered in the city centre on Monday night to see out 2012 by remembering some of the best moments from one of its most memorable years in recent history.

On Tuesday morning, 200 clean-up staff took just under six hours to clear around 160 tonnes of rubbish in Westminster to get the streets ready for the New Year's Day parade.

The Metropolitan Police said 96 arrests were made relating to the celebrations, with drunkenness, public disorder and assault the most common offences.

About 250,000 spectators were estimated to have watched the colourful and noisy pyrotechnics display, which featured 12,500 fireworks.

Many of them waited for hours to secure the best viewpoints on the banks of the Thames on what was a dry and mild night.

Mayor of London Boris Johnson said: "What an amazing end to an incredible year. Watched by hundreds of thousands in the capital and millions around the globe, London has proved, yet again, that it can pull off spectacular world-class events in style."

More than 3,500 police supported the organisers and stewards of the event, working alongside colleagues from British Transport Police and other emergency services to keep revellers safe.

Chief Inspector John Williams said: "This year saw the viewing areas fill up earlier than ever before with thousands of revellers coming to see in the new year London-style. Officers worked hard, alongside the stewards, in very large crowds to keep people safe in what is a challenging policing environment, helping to ensure revellers and visitors alike could make their way home at the end of the night."

The New Year's Day parade will see a procession of Olympic Games Makers, drummers, stilt walkers and Bolivian dancers greet 2013 as they snake their way through central London.