The police operation for Donald Trump's visit to the UK in July cost almost £18 million, it has been revealed.
Thousands of officers were deployed to cover the three-day trip by the US president to the UK in July in the largest mobilisation since the 2011 riots.
Sara Thornton, who chairs the National Police Chiefs' Council, said it was a "significant operation" with the US President visiting four force areas and protests taking place in many others.
In a blog published on Thursday, she wrote: "Nearly every force supported the operation with nearly 10,000 officers deployed from all over the country, performing over 26,000 shifts.
Honoured guest: Donald Trump met the Queen during his three-day trip to the countryPA Wire/PA Images"The full cost of the operation is still being worked out but an early estimate is nearly £18 million. All forces reported high demand at the time of the visit from the requirements of the operation as well increased demand and calls from the public linked to the World Cup and hot weather as well as numerous events and festivals.
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She added: "The majority of forces had to cancel officers' rest days and extend the length of their shifts. Despite the challenges, the hard work of officers and staff made sure that the public were kept safe throughout."
Making his first visit to the UK as President, Mr Trump held talks with Prime Minister Theresa May and met the Queen at Windsor Castle, before travelling to Scotland where he played golf at his family's Turnberry resort.
Police outside Blenheim Palace, in Oxfordshire, where Theresa May hosted a dinner for Donald Trump
PA Wire/PA ImagesHis schedule meant he avoided thousands of protestors who took to the streets of central London, as well as the infamous Trump baby blimp in Parliament Square.
Following his meeting with the Queen, he described her as "beautiful inside and out".