There alternative, suitable rooms available at my workplace. Was recently given a room to express, it is a large room, is secure and has a lockable door. There is a desk to sit at etc.
The room is used amongst other things for toileting; changing cathetas was mentioned, I am assuming it could be used for colostomy bags- but not sure on this one.
I really don't feel comfortable expressing for my little one in there, in fact I really feel it is inappropriate.
When I expressed concerns was told that the room was very clean and it was cleaned regularly.