You seem to have a problem accepting a basic fact. That fact is if a conductor is not available for a particular service run by Northern, then that service will be cancelled.You both seem unaware that it was reported on this forum Northern had the same issues the previous time 24 and 31 Dec fell on a Sunday. It's a joke to think Northern could only request replacement buses two days before. They could have done it when the timetable was confirmed.
They obviously knew about the staffing issues prior to Network Rail giving them notice the Bolton closure on 31 December. They just didn't know the exact number of services volunteers would cover.
I just hope you two don't try to manage a transport operation, if you think having plan B is only needed when plan A actually fails.
This is.a regular problem on Sundays as staff are quite rightly having a day off.
No amount of you posting waffle on here is going to change that