Mark Sedwill appointed as National Security Adviser
![Mark Sedwill](https://homeofficemedia.blog.gov.uk/wp-content/uploads/sites/196/2017/02/PUS-e1488203955828-1-620x410.jpg)
The Prime Minister, Theresa May, has announced a series of senior Whitehall moves today (Monday, 27 February) including the appointment of Mark Sedwill as the UK’s new National Security Adviser, succeeding Sir Mark Lyall Grant who is retiring.