I'm curious about the floor. Looks like older bricks with a very straight track which has been filled in with a series of wooden blocks. I know this was originally an airplane factory, but I also remember reading that quite a bit of time and expense went into refitting the place for car making. I wonder whether it is from its airplane years or from the refit. I also wonder what that track was used for and, if it was one of Frazer's ideas, why it was decided not to use it any more.
Really wish I could walk down that assembly line and fill a few shopping carts to use now!