We've just had a very worrying bit of news about this case. Just about all the details we thought we knew were wrong. No bulky jacket, no bag, no jumping the ticket barrier. He was mis-identified as he left the flat, and ran for a train.

The police protocol for suicide bomb suspects is to shoot if they run.
I'm a young man who's run for trains whilst carrying odd shaped bags.

Looks like there was a major failure of the sysytem, and he was the wrong person in the wrong place at wrong time.