"Sometimes things that are not true are included in Wikipedia. While at first glance that may appear like a very great problem for Wikipedia, in reality is it not. In fact, it's a good thing." - Wikipedia.
In the "BRITAIN AT WAR" September 2013 issue (no. 77) you can find an article about "THE MESSINES MODEL", pages 80 - 86. The article contains WW I era - photographs and actual pictures.
 http://www.richard.hot-thing.co.uk/pages/messines_model_2013.html
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My local scientific & history society visited last year & were very impressed by the War Hut (I missed the trip as I was working) and recommend a visit to anyone who is in reach.