In the 2005 Birthday Honours, Manningham-Buller was appointed to the Order of the Bath as a Dame Commander (DCB). She resigned from MI5 on 21 April 2007, and was succeeded by her deputy, Jonathan Evans. That month marked the end of her 33rd year in the Security Service. She was raised to the peerage as Baroness Manningham-Buller, of Northampton in the County of Northamptonshire on 2 June 2008.