Do you know for sure one of them is BK?
If there's a relaxation then that's on the prison service, govt, authorities.
They know if it is BK they present a massive risk.
If they say yep into the general population that is on them.
BK is clearly very very disturbed. It's not right to lock up 23 hours s day. No matter what crime.
Prison is for punishment, rehabilitation, protection of the public.
BK will be released at end of term. If spent however long living like that. Well it won't have made them less incredibly dangerous will it.
They should be in a secure MH facility. No risk to women. Getting help. Different rules apply- not released until better even if that means never.
What's the Irish equivalent of Broadmoor. There is where they should be.