Good solid day of progress today.
One of the other guys drilled out and bolted down the bases of the two stanchions while I cut and welded in a diagonal brace to the large door, to stop it sagging.
Once the stanchions were bolted down we fired into the front-to-back sleeper wall:

Which is now done, so the container needs dragging away from the wall so the stud-wall can be put up.
Next bits are the bottoms to the doors, which have been cut for a while and then the panelling in of the door.