Counter-terrorism police are still investigating the incident at RAF Brize Norton, and it is right that we allow them the space to complete that investigation. The wider review looks at security at not just RAF Brize Norton, but all defence sites. We are looking with colleagues across Government at what investment is needed, and at how we can work with others to secure the safety of sites to ensure that the UK maintains operational security for all its assets.

I do not want to pre-empt the findings of all the reviews, but the right hon. Gentleman is right that our air bases tend to cover a large area. The perimeter fences we inherited on many of our air bases were not designed to keep everyone out with large things, but to be a perimeter defence. In the ongoing security work, we are looking at how technological solutions and changes in guarding might contribute to enhanced security, given the increased threat that we face.