I am replacing my bathroom suite and moving one of the walls back to accommodate a longer bath. The plaster has come off of the walls with the tiles and so the room will need replastering. What i want to know is whether the new bath should be put in place and then the plaster put on the walls so it overlaps the edge of the bath slightly or is it better to have the plaster put on the walls and then the bath put in flush against the plaster so that only the tiles overlap the edge of the bath. Thanks for any help.