On 7/7, a reminder of this startling memory-holed article about Bruce Lait from the Cambridge News:

http://operation-mockingbird.blogspot.com/2008/05/journalists-and-7-july-london-bombs.html

"The policeman said 'mind that hole, that's where the bomb was'. The metal was pushed upwards as if the bomb was underneath the train. They seem to think the bomb was left in a bag, but I don't remember anybody being where the bomb was, or any bag," he said."

And then there is this:

http://news.bbc.co.uk/1/hi/england/london/5050372.stm

"John was injured in the explosion in his carriage and describes how he and another passenger called Jason tried to help a man called Stan who was trapped in a hole in the floor.

The metal all around it [the hole] was all jagged and bent from the explosion. Parts of the metal were covered in blood."

The modus operandi:
http://tinyurl.com/56gka9