Boris Johnson ally David Frost to become UK national security adviser

David Frost is Britain’s chief negotiator with the EU and will replace Mark Sedwill

FILE PHOTO: British Prime Minister Boris Johnson's Europe adviser David Frost leaves the European Commission headquarters after a meeting with officials in Brussels, Belgium, October 7, 2019. REUTERS/Francois Lenoir/File Photo
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One of Boris Johnson’s closest political friends has been appointed the UK’s next national security adviser.

David Frost is taking over from Mark Sedwill, Britain’s most senior civil servant, who announced on Sunday he was resigning as national security adviser and Cabinet secretary.

Mr Frost, who is Britain’s chief negotiator with the EU, will replace Mr Sedwill as national security adviser in late August.

The civil service has lost a number of its leaders since Boris Johnson’s Conservative Party won last December’s general election, and Dominic Cummings became an adviser to the prime minister.

Mr Cummings, who faced calls for his own resignation after he drove from London to Durham in northern England during lockdown, wants major changes to the civil service.

Mr Frost is close to him and his appointment could be a sign that Mr Cummings remains influential in Mr Johnson's administration, ITN reported.

“I look forward to helping deliver the prime minister’s vision for a global Britain, with real influence around the world,” Mr Frost said.

He will remain chief negotiator for the rest of the Brexit talks.

Britain is still hammering out its final deal with the EU as the end-of-year deadline approaches.

Some believe it could eventually leave without any agreement being reached.

(FILES) In this file photo taken on July 24, 2019 Britain's Prime Minister Boris Johnson (CL) shakes hands with Cabinet Secretary Mark Sedwill (CR), Head of the Civil Service, as he is clapped into 10 Downing Street in London on July 24, 2019 by Mark Spencer (L) and Johnson's special advisor Dominic Cummings (R) among other staff after he accepted the invitation from Queen Elizabeth II to become Prime Minister and form a new government.  Mark Sedwill has announced on June 28, 2020 he will stand down from his role as Cabinet Secretary, National Security Adviser and head of the Civil Service in September 2020. / AFP / POOL / Stefan Rousseau
Britain's Prime Minister Boris Johnson, left, shakes hands with national security adviser Mark Sedwill. AFP

Mr Johnson said he was confident Mr Frost would make a “difference to this country’s ability to project influence for the better”.

Mr Frost has extensive experience in diplomacy, including a stint as ambassador to Denmark and at the Foreign Office, where he has previously worked with Mr Johnson.

Politics Home reported Mr Frost had also joined the advisory council of Open Europe, a British centre-right Eurosceptic policy think tank, during a spell away from the civil service.