The highest ranked civil servant in the country, Sir Jeremy is the man at the sharp end of making Brexit work. He has an intimate knowledge of the machinations of government and power. The nitty-gritty details of Brexit will fall squarely on Whitehall, and the support of the civil service will be vital.
Theresa May’s ministerial team has been accused of surrendering the Brexit negotiations process to the whims of civil servants. Since Brexit, Whitehall has been expanding the Civil Service and with more responsibility, Sir Jeremy now wields more influence in the government.