In message , Richard J.
writes

There is no legal requirement for the person discovering the fire
personally to dial 999. The requirement is that *someone* must
immediately activate the local warning system (sound the fire alarm for
the station), and that someone must *call for* the assistance of the
fire brigade.

Well, in both cases the "someone" is the person who suspects that there
is a fire, according to the regulations. There's nothing about reporting
the fire to the station manager or other person authorised to call the
fire brigade.

I agree that there could be some ambiguity, but they do say that any
member of staff who suspects a fire must call for the assistance of the
fire brigade (under penalty of being guilty of an offence under section
12 of the Fire Precautions Act 1971).

Would telling someone else to call the fire brigade be enough to fulfil
that obligation? Probably only the courts could decide, but it's worth
bearing in mind that the regulations were introduced because of delays
and confusion in calling the fire brigade to tube-station fires over the
years.
--
Paul Terry