About Mark Lyall Grant
Sir Mark Justin Lyall Grant 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. In April 2012, Lady Lyall Grant, with Huberta von Voss Wittig, made a video appeal to Asma al-Assad, calling on the Syrian first lady to take a stand against violence in her country. On 27 February 2017 it was announced that Lyall Grant would retire in April and be replaced by the Home Office Permanent Secretary Mark Sedwill.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.