The plan shows a building that is used between eight and six by people who arrive through the front door. The night shift uses a different building. It arrives through the loading bay, works in three of the rooms, and spends a surprising amount of its time in a corridor that the plan describes as circulation.

That corridor has the only window on the floor that faces east, and at four in the morning in June it is the first part of the building to get light. Someone put a chair there years ago. Nobody has ever moved it, and nobody has ever put it on a drawing.¹

We spent a week working the same hours, which is the cheapest research a practice can do and the kind it almost never does. The list of what we learned is short and none of it is surprising once it is written down. The lighting is wrong for the work that is actually done under it. The loading bay is the real front door and looks like the back one.²

And the chair stays. The refit moves a wall to give it a little more room, which is the only change in the whole scheme that the night shift asked for and the one they will notice first.