Britain’s ambassador to the United States called President Donald Trump “uniquely dysfunctional” and expressed grave concerns about American economic and foreign policy in a series of cables that were leaked to the British tabloid the Daily Mail and published on Saturday.

The leaked cables, prepared by Sir Kim Darroch (who has served as ambassador from Britain to the US since January 2016), cover the entirety of the Trump presidency, even touching on an official state visit to the UK less than a month ago, when the Trump and his family attended a banquet at Buckingham Palace and afternoon tea with Prince Charles and Camilla, and laid a wreath at the Grave of the Unknown Warrior.

Despite the widespread and colorful protests that took place during that visit, Darroch wrote afterwards that the UK might now be “flavour of the month” in Trump’s eyes. But these leaks may challenge whatever goodwill emerged from the US president’s visit.

In the documents, Darroch describes “vicious infighting and chaos” within the Trump administration, and said that collusion between Trump and “dodgy Russians” was possible.

He also warned that an “America First”-style foreign policy could undermine international trade agreements, and warned negotiations over Brexit could introduce further conflict into the two countries’ diplomatic relations.

Trump has endorsed Brexit in the past, and recommended the UK “walk away” from the EU without a deal ahead of his state visit. After it leaves the European Union, the UK will need to renegotiate a number of its trade agreements, and could look to strengthen its trade ties with the US. Darroch wrote doing so could be easier said than done due to the Trump administration’s stances on a variety of issues.

“As we advance our agenda of deepening and strengthening trading arrangements, divergences of approach on climate change, media freedoms, and the death penalty may come to the fore,” the ambassador wrote.