The state of security across the Defence estate is generally satisfactory. The Department, in common with similar large organisations, faces ever-changing threats and challenges to its security. High priority is given to security at MOD establishments, the risks posed to buildings and staff are kept under constant review to ensure that appropriate levels of security are applied through a process of risk management. For obvious reasons it is not practice to reveal MOD security measures publicly. However, I can assure the hon. Member that wherever a security incident occurs, it is speedily investigated and remedial action is taken if appropriate.