A senior MI5 veteran is set to become the new head of the British intelligence agency GCHQ, according to reports.
Jeremy Fleming, the deputy director-general of MI5, has worked for the security service for at least 20 years and had a role managing security at London 2012.
His appointment comes after the agency took the highly unusual step of publicly denying claims made by Donald Trump's press secretary, Sean Spicer, that GCHQ had helped Barack Obama spy on the then presidential candidate.
US officials were forced to make a formal apology for repeating the claim – initially made by an analyst on Fox News – that GCHQ was used by Mr Obama to spy on Trump Tower in the lead-up to last November's election.
The comments prompted a furious response from GCHQ, which in a break from normal practice issued a public statement: "Recent allegations made by media commentator Judge Andrew Napolitano about GCHQ being asked to conduct 'wiretapping' against the then president-elect are nonsense. They are utterly ridiculous and should be ignored."
Mr Fleming's new role follows the resignation of Robert Hannigan in January, who left his post for "personal reasons" .
In a letter to the Foreign Secretary Boris Johnson, he hinted that the strain placed on his family by his job had prompted his departure.
A source told the Sunday Times: "Jeremy will be expected to make a trip to the US very early on to seek reassurances from our partners," a source said.
"I don't think the rubbish being uttered by the Trump camp will affect the day-to-day operational co-operation between the UK and US intelligence agencies, but it'll be important to remind our partners there that more consideration and respect need to be afforded to the intelligence communities by the Trump administration."
Another added: "He has a personable style and is very easy to work with."
This week Mr Johnson will fly to Washington to help bolster relations following the row over intelligence sharing.
He is expected to meet with a number of Mr Trump’s closest aides in the White House on Tuesday and senior Republican congressional leaders.