As a network built to serve its customers we have to be prepared to ensure we can provide you with a smooth and reliable experience no matter what. In the event of network or equipment failure, or heavy congestion, we may have to deploy technology to ensure that our network runs smoothly, supporting time critical traffic and minimising disruption, we do not block access to or slow down traffic on our network unless it's legally required, to protect network security or to manage congestion in exceptional circumstances.