I don’t think there was any choice in early release , the POA ( the union) even said that.
Prisoners have been accidentally released for many years , it isn’t anything new and most thankfully are sent straight back. It’s usually admin errors, or a mixup between offender management and probation. Lots of departments work in a prison.
I think it stands to reason that when you have a mass amount of early releases , it’s likely that mistakes can happen.
Even calculations can go wrong , it can be human error. This isn’t something I deal with personally as it’s not part of my role.
Funding for prisons is never a priority for any government but the last government really neglected it and the new government have been left with a mess.