Jonathan Morris wrote:
What exactly is the procedure for dealing with an alarm set off on a
tube train?

This morning, at approx 10.15am, I boarded a Circle Line train
eastbound at Kings Cross. As the doors closed, someone pulled the
alarm (not sure where). The doors then opened and the (female)
driver said 'We are aware that the alarm has been pulled. Would the
person that did so please make themselves known to a member of
staff'.

This strikes me as rather odd. If it was someone taken ill, how
would this work?

Someone near the ill person would stand at an open door and shout/beckon
to the driver or station staff. If the doors hadn't been opened, the
driver would have had to struggle through the (possibly crowded) train
looking for the source of the alarm, which would have wasted valuable
time. AFAIK there is no means on C stock of the driver talking directly
to the person who pulled the alarm, as there is on more modern stock.

If it was someone being attacked, why let them run off the train?

So that they could escape from their attacker? Or perhaps you meant why
let the attacker run off the train? Bearing in mind that there is no
way for the driver to know whether the alarm was pulled for a medical
emergency or an attack in progress or some other reason, what would your
solution be?
--
Richard J.
(to e-mail me, swap uk and yon in address)