THere’s a website that is run locally, for local news. It has a forum section for quesitons and debate. One of the latest questions:
“What exactly does one do on the Tube when one spots a nervous-looking fellow passenger of Middle Eastern or Pakistani appearance with a rucksack?”
And then suggest a few course of actions such as leaving or pulling the comms cord. One further suggestion is to politely ask them if they mind being asked what’s in their rucksack.
The perils of modern manners.