Moorgate trains terminating at Old Street this morning

There was an external power failure which affected the station lighting - Trains terminated at Old Street on the 'UP' road continued ECS in/out of Moorgate and restarted service at Old Street at their booked time; I recall that towards the tail end of the Morning Rush Hour the station had re-opened although portable lighting was brought down from either Alexandra Palace, Hertford and/or Stevenage as a contingency.

HTH.