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Yeah it's going to be very unpleasant I think. Will cover everything and seal the room when we do it.
Howard-
https://www.screwfix.com/p/starrett-db2-debris-dust-collector-202mm/606HY
Hole saw and crap collector minimises the mess for smaller holes
It won't catch water or electricity so beware of what maybe hidden.
user69121
Don't forget to anticipate a load of crap coming down with the ceiling -deliberately added ashey stuff for mass as well as randomly accumulated crap that's fallen through the floorboards over the decades.