This has been playing for so long now that the details have somewhat escaped me.
Is my memory correct that...
1- The trains were originally ordered with DOO in mind, and that the role of guards would go away on Merseyrail altogether?
2- That led to a long-running dispute between Merseytravel and the RMT, with ASLEF siding with the RMT here, which eventually got resolved by commitment to keep the guards on the train?
3- Which needed significant changes to be made to the already ordered rolling stock, as this wasn't designed with guarded operation in mind?
4- But the solution implemented the driver being fully in control of the doors anyway, only giving the guard a way to inhibit a local door while they perform their duties?
5- A way of working which got voted down by ASLEF members?