Rail strikes are causing disrupting to New Year’s Eve rail services, with passengers facing widespread delays and cancellations.
After 12 months marred by division over Europe, terror attacks in London and Manchester, cabinet resignations and a calamitous general election result, Ms May acknowledged that “any year brings its challenges”.
Meanwhile, Mr Corbyn's new year message declared Labour "a government in waiting" after the party increased its share of Westminster seats in May's general election.
There will be fewer police in London for tonight's New Year’s Eve celebrations compared to previous years, despite four serious terror attacks in the capital during 2017.
But a larger number of armed police will be deployed, the Metropolitan Police said.
He said the UK was being “held back by a self-serving elite who look after themselves and their friends”.
But the Labour leader said his party was "staking out the new centre ground in British politics" and that "the old political consensus was finished".Edinburgh's celebrations will feature kve music, DJs, street entertainment and fireworks displays from Edinburgh Castle, as well as street performers, dancers, acrobats and fire-eaters.Rag'n'Bone Man will headline the Concert in the Gardens main stage, while those performing on the three Street Party stages include The Human League, Sacred Paws, Treacherous Orchestra and Huey Morgan.Samoa, a tiny pacific island, welcomed the new year at 10am GMT, followed by New Zealand an hour later.In Australia, 2018 arrived at 1pm GMT with as many as one million people watching Sydney harbour’s world famous fireworks.SWR warned passengers to expect reduced services and said the trains that run "are likely to be exceptionally busy".