Mark Lyall Grant

Sir Mark Lyall Grant
Mark Lyall Grant speaking at Chatham House in 2011
United Kingdom National Security Adviser
In office
7 September 2015  13 April 2017
Prime MinisterDavid Cameron
Theresa May
Preceded byKim Darroch
Succeeded byMark Sedwill
Permanent Representative of the United Kingdom to the United Nations
In office
1 November 2009  25 April 2015
MonarchElizabeth II
Prime MinisterGordon Brown
David Cameron
Preceded byJohn Sawers
Succeeded byMatthew Rycroft
Director-General for Political Affairs at the United Kingdom Foreign and Commonwealth Office
In office
2007–2009
Preceded byJohn Sawers
Succeeded byGeoffrey Adams
Personal details
Born (1956-05-29) 29 May 1956
Hammersmith, London, England
Spouse(s)Sheila, Lady Lyall Grant
Children2
EducationEton College
Alma materUniversity of Cambridge
Websitewww.gov.uk/government/people/mark-lyall-grant

Sir Mark Justin Lyall Grant GCMG (born 29 May 1956) is a former senior British diplomat who was previously the United Kingdom's National Security Adviser and Permanent Representative of the United Kingdom to the United Nations.