After going through the museum and the British underground command bunker you emerge into a new area focussing on the battle of Passchendale. There are several rooms of exhibits and weapons, and it is very well done.
These are in the new rooms - firstly a Minenwerfer with shells:
A German 150mm with limber:
A very impressive display of shells:
German trenches with firestep:
German sniper position:
German trenches with reversed A-frames:
British trenches with firestep:
And the German trenches from ground level: