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Mr Trump, who will take the oath of office later this week, has already been blasted by security services in the States as “a hostile actor” who is “very possibly compromised by Russia”. But British agencies are also believed to have questioned the President-elect’s loyalty, and are allegedly expected to retain information until they can be sure he is trustworthy. A UK intelligence operative said: “Until we have established whether Trump and senior members of his team can be trusted, we’re going to hold back.

GETTY British agencies have allegedly questioned the President-elect’s loyalty

“Putting­ it bluntly, we can’t risk betraying sources and methods to the Russians.” It comes as Russian influence disrupts the diplomatic world order, with warming US-Russian relations threatening to leave the UK out in the cold. Foreign minister Boris Johnson had a difficult first meeting with the President-elect’s senior advisors Steve Bannon and Jared Kushner last week, after his warnings of Russia’s “dirty tricks” were met with a frosty reception.

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GETTY It comes as Russian influence disrupts the diplomatic world order

A source close to the Trump team told The Sunday Times: “The meeting didn’t go well. They were not very impressed.” But Mr Johnson lauded the “positive but frank” meeting as a success, and part of the initial steps towards a new trade deal between the two nations. Last week the Russian embassy in London appeared to undermine the close ties between Britain and the US in a provocative tweet.

GETTY Mr Trump will take the oath of office later this week

GETTY Foreign minister Boris Johnson had a difficult first meeting with the Trump's senior advisors