I have some feedback from a lady who claims that her dad was stationed at one of the Balloon Sites I had mentioned in my blog.  This prompted me to look on the internet for more information on Barrage Balloons, and there  is plenty to find there. 
   Just by chance I found some old photographs and in among them was a picture of a Barrage-balloon winching vehicle.

That winch vehicle looks very much like "ours", but I can't remember where I took this picture, obviously in a museum somewhere.