On Wed, 30 Jul 2008 16:33:48 -0700 (PDT), John B wrote:

I heard an interesting rumour about that a few weeks ago, which I pass
on without the benefit of any knowledge to assess its accuracy !

The reason why there was no CCTV footage of Stockwell, which IIRC was
stated to be because the cameras "weren't working", may have been because
many/most/all of the hard drives of many/most/all of the video recording
systems from across TfL were at that moment sitting in a big pile in a
police station somewhere, awaiting police time to review the footage
for evidence related to the then-recent bombing attempts, but nobody
had anticipated that more than a couple of spare hard drives would be
needed across the network so there were too few to install in their place.

No idea whether that's true, but I like it a lot and it certainly has
a ring of truth to it...

It doesn't ring true with me. Why then was there CCTV footage
available of the ticket hall and escalators? Why was only the footage
of the platform missing?