Well into this incident LU passengers were being allowed to use NB
trains to reach Seven Sisters prior to the train stabling in
Northumberland Park Depot, even though the 'official' view was nothing
running north of Highbury. WAGN actually asked if LU wanted more trains
to call at their part of the station.

I wonder if the decision to close the NR platforms had at least
something to do with the fact that it was easier for local managemwent
to deal with the incident without the "inconvenience" of those pesky
passengers. Fair enough maybe when a life is at stake, but not when the
person has been pronounced dead and is safely screened from the route
from NR to street.