In my experience if one has a boss unaware of safety responsibilities, they usually come to heel if one suggests their behaviour is drawn to the attention of the relevant MP.

If this case a Lord sems to be involved so that brings added attention to it.

A positive response would be if Hendy were prompted by Dennis’s article toward investigating further for himself, such as going out to Euston Station and making his own judgement. If risks from overcrowding remain and Hendy has any control beyond meeting standard requirements, then his responsibility lies here. Otherwise, he is merely attempting to shirk responsibility. If an incident were to occur – res ipsa loquitur.