David George Hamilton Frost, (born 21 February 1965) is a British civil servant and policy advisor serving as the Prime Minister's Europe Adviser and Chief Negotiator for Exiting the European Union since 2019.
He previously served as Special Adviser to Boris Johnson as UK Foreign Secretary.
Frost spent most of his earlier professional career as a British diplomat, working among other things as HM Ambassador to Denmark, EU Director in the FCO, and Director for Europe and International Trade at the Department for Business (BIS).