Thanks Stu. Such a lamp is what gave me the idea. Problem is, my wife rather likes the ones we have I could have a look for a secondhand one though. The ones used by architects in the 1970s are really good but have become retro fashion here so tend to fetch high prices.
Thanks Nick, I am looking forward to knocking some provender wagons etc about. I seem to remember that fodder for the GWR's stables was brought in via the system rather than purchased locally. Need to check up on that though.