The Department is security regulator for transport industries including the rail network in Great Britain and the London underground. We maintain a risk-driven protective security regime based on assessments of the terrorist threat prepared by the Security Service.
The London attacks in July 2005 necessitated the raising of security measures to their highest level, with a package of supplementary measures deployed by rail and underground operators. In response to the London attacks we also developed, in consultation with industry and the police, specific best practice guidance for the bus and coach sector.
The situation is kept under constant review to ensure that measures remain relevant. We also continue to look at what further practical measures can be taken to protect transport targets.
It is not appropriate to discuss the specific details of our current or any potential future counter-terrorist security measures on public transport to avoid potentially compromising their effectiveness. However, it is important to remember that our rail and underground networks, and bus services, are open systems and it is therefore impracticable to impose the sort of security regimes seen at our airports.