This is a very fast moving emergency situation, so please note that this response was based on the developments and advice given at the time.
There is currently no suggestion that restrictions on travel will be imposed. The maintenance of essential services to enable London to function is core to the principle of any emergency response. This includes our highly resilient transport network. I continue to follow expert advice, and there is no suggestion that we should restrict travel to such an extent that critical employees such as the emergency services staff cannot get to work.