She is the daughter of the late Brigadier Christopher Browne OBE and Margaret Howard.

From Linacre College, Oxford she gained a DPhil in Bacterial Genetics in 1985.

From 2002–05 she worked for the Permanent Representatives of the United Kingdom to the European Union.

[6] In January 2017 the Foreign and Commonwealth Office announced that she was to be replaced in early 2018 and was to transfer to another Diplomatic Service appointment.

[8] On 1 February 2019, she joined the Technical Secretariat of the Organisation for the Prohibition of Chemical Weapons (OPCW) as the Director of Verification.