Sounds like the standard British disease of 'a ship being ruined for the want of a ha'perth of tar'.
You can just imagine the scenario..... some middle manager in a sub-committee saying 'no we don't need that backup device, so we can save ourselves a tenner', 'we can use a paperwork mitigation by saying we train the staff to a high level that makes such backups un-necessary' He then wanders off and gets a pat on the back by his seniors for saving the company a tenner. The next middle manager then saves a tenner by cutting back on training costs and gets his pat on the back from his seniors.
I bet the public never get a satisfctory explanation of what actually caused all this. Just a load of management speak from a
PR prat who has been paid three tenners to come up with a cover up.
(for our foreign readers a 'tenner' is roughly 10 GBP, in other words an insignificant amount.)