This is my narrow gauge guards van. It is based on an example preserved at Explosion! the museum of naval firepower at Priddy's Hard in Gosport, Hampshire, UK. It was formerly part of the rolling stock at the Royal Naval Armaments Depot Dean Hill, which has since closed.
Note: (with reference to Moleveld's criticism) It is not a "bad idea to add TECHNIC figures to the train scene". It is a new area of Lego creativity. Greater detail can be used (the chevrons for example) on the models as well as opening up narrow-gauge stock that cannot be worked in minifig scale to modelmaking. Technic-fig scale equates Lego track to a gauge of 2'6''. Thus one can actualy run narrow-gauge trains. These have already proved very popular at UK events. It enhances the model, never degrading it.