"Pat O'Neill" wrote

RAIB would be very interested

Indeed. They have previously issued a bulletin with regard to a similar
incident.
http://www.raib.gov.uk/cms_resources...%2005-2010.pdf
It would make more sense for the OP to report the incident to them, in case
LUL have failed to do so, rather than rant here

However. much of the rest is pure rant. How is the platform attendant (not
dispatcher - Victoria Line trains are dispatched by the driver/train
operator) to know that there is a problem which means that the train is not
actually about to depart? Was Warren Street station actually closed as a
result of this incident - I can't see how it would immediately affect the
southbound Victoria Line, or the Northern Line. And if the gateline was
still in operation, it will at least mean that PAYG passengers have evidence
of leaving at Warren Street, so can no doubt get their fare refunded or
compensation for the disrupted journey.

Peter