We took ourselves off to B&Q this morning to buy some sand for the dust bath and several sacks of softwood chippings for the floor of the run. There's a good deep layer there with huge scratching potential!
The final job was to make the chicken ladder so they have access to the raised hen-house doorway. It hooks over the frame of the hen-house support so it's really secure but can be removed by lifting the front of the house a little and un-hooking it. I was going to paint it in the dark oak wood preservative that the stand is painted in, but I had a little think and decided that when the light is going and you need to find your way back home before the final darkness falls and the pop-hole closes, you need a light path to guide you, not something that sinks into invisibility in the twilight. That's the theory anyway!