The testing of systems and training of staff is necessary to ensuring the safety of the railway. Currently, testing at Custom House happens on a Wednesday. Any necessary testing of the fire panel takes place after 10:00 and before 15:00 for the consideration of residents. There is no scheduled testing taking place outside of these hours.
On two occasions in February the fire alarm was triggered in the early hours of the morning by an individual smoking in the external lift. Usually, a member of staff at the station would be able to silence the alarm. Unfortunately, on 14 February, the system encountered a fault and the station team required an engineer to attend, which took an extended period of time.
Transport for London (TfL) is very sorry for the disturbance caused by the alarm and is investigating the fault in the system to ensure that this type of incident does not happen again.