One of the board papers for the 22nd Sept meeting is a four page summary of
the recently discussed incidents:

http://www.tfl.gov.uk/assets/downloa...-Incidents.pdf

Includes the Northern line Rail Grinding Train runaway, and it turns out a
previous incident on the Jubilee line with the same train! .

Also the Plaistow signalling irregularity, which was quickly found to have
been caused by 'a defective component'. Here they report that the train was
correctly back tripped, and ISTM this confirms that the 'trains on collision
course' scary headlines were indeed wrong, as both trains were stopped by
the signalling system.

"...checks have been undertaken and ensured that similar components are not
present at other sites potentially affected by modifications."

Interesting stuff...

Paul S