Question to the Ministry of Defence:

To ask the Secretary of State for Defence, what steps his Department is taking to ensure that the UK's submarine fleet is not detected by unmanned underwater vehicles deployed for anti-submarine warfare purposes.

The Ministry of Defence places a high priority on assuring the effectiveness of our submarine fleet and countering threats to our submarine operations. We continue to monitor and evaluate capabilities and technologies that could threaten submarines, including cyber and unmanned vehicles. It would not be appropriate to go into specific detail of the steps taken to mitigate against these threats. We assess, however, that the ocean will remain a complex and challenging environment in which to conduct large scale anti-submarine warfare, despite advancements in technologies. We are therefore confident that our submarine fleet remains safe and secure.