Policing Donald Trump's four-day visit to the UK cost more than £14.2m, according to figures obtained by the Press Association.
The US President was greeted by a number of protests as he met the Queen at Windsor Castle, was hosted by Theresa May and played golf in Scotland.
With thousands of officers drafted in from every force in Britain, policing July's trip cost in excess of £14,258,966, according to police figures released under Freedom of Information laws.
The Home Office reimbursed £7.9m to cover the additional costs to the three forces in England that "hosted" Mr Trump - the Metropolitan Police, Thames Valley Police and Essex Police.
The Treasury was to refund Police Scotland.
Before Air Force One touched down on July 12, the combined police and security bill had been estimated at £10m.
And with the Foreign Office costs not yet disclosed, the total price of the visit is likely to be significantly higher.
The biggest bill came from Thames Valley Police, which spent more than £6m policing Mr Trump's visits to the Prime Minister's country residence Chequers and Windsor Castle.
Also on Thames Valley's patch is Blenheim Palace, where the Prime Minister hosted a black-tie dinner for Mr Trump and his wife Melania as a highly controverisal newspaper interview was released.
In a most unwelcome move, the property mogul told The Sun that he would have handled Brexit negotiations "much differently" to Mrs May and that her plan could "kill" any UK-US trade deal.
The Met said its spending came in at just under £3m, in part due to tens of thousands coming out to protest against Mr Trump.
Essex Police, which oversaw the policing of Stansted Airport where Air Force One touched down, spent more than £1.86m.
Mr Trump's trip to Scotland, during which he played golf at his Turnberry resort in Ayrshire on both days, cost £3.2m.
Thousands also protested across Scotland during what was termed a "private visit", and police investigated a Greenpeace-backed paraglider who flew over the resort.
Police Scotland's sum fell short of its advance estimate of £5m, because the President did not visit his Aberdeenshire estate as budgeted for.
"The revised total reflects the fact that his visit was confined to Turnberry," said Assistant Chief Constable Mark Williams.