The FIR into 2003's Chancery Lane derailment identified deployment of emergency detrainment ladders as one issue of concern. There were also concerns that in the aftermath of the bombings on 7th July last years, the ladders had proved difficult to remove.
One simple way to address this? How about demonstrating the use of the ladders during ATOR each year? It would take five minutes and save a load of grief when things go wrong.
You'd think so, wouldn't you? But not for LUL management. Too much hassle, it seems.