&gt; Before I was allowed down into the building site, I had to be shown what to do in case of emergency. Basically, &quot;run away from the smoke if you can.&quot;<p>I met a guy at an after work thing a few years back, somewhere in the city, who said he worked with contingency planning for TfL. I asked him, what&#x27;s the plan if there&#x27;s a fire in the tube, one of the older lines where you&#x27;re deep, deep underground, and there&#x27;s heavy smoke development? His answer wasn&#x27;t very re-assuring: &quot;we pray.&quot;<p>Since that day I very rarely, if ever, take the tube anywhere. If I do I make sure it&#x27;s on off hours when there aren&#x27;t as many people on board or in the stations. Irrational fear, for sure, but coupled with the extreme amounts of people you may find, with people literally jammed up against the walls, I figure I&#x27;d rather spend a few more bucks on a cab, or just spend more time walking.<p>(Also the signs in various stations, King&#x27;s Cross for instance, commemorating the victims of accidents and&#x2F;or attacks aren&#x27;t really re-assuring.)