I recently became aware of this book from Pen & Sword - Wargames Terrain & Buildings - WW1 Trench Systems by Douglas Hardy. Regular readers and followers will know that this is the third book in this series published by Pen & Sword, the first two being; Wargames Terrain & Buildings - The Napoleonic Wars and Wargames Terrain & Buildings - North Africa and The Middle East, both written by me.
I should make it clear that I have nothing to do with this third book, but thought it would be of interest and worth posting a link. For more information I have included this You Tube link.
Good luck to Douglas and Pen & Sword.