Question to the Ministry of Defence:

To ask Her Majesty's Government, further to the Written Answer by Baroness Goldie on 10 June (HL4948), what assessment they have made of extending the use of Sentinel beyond 2021; and whether this will be included in this year's Strategic Defence and Security Review.

Sentinel's radar and mission system are now increasingly obsolescent and will face increasing reliability issues as time progresses. Retaining the capability would have required significant upgrade expenditure and the March 2021 out of service date (OSD) has been retained. It is necessary to retire certain capabilities at planned OSDs to allow re-investment in future capability.