
I've got an idea (yes I know thinking is dangerous and I shouldn't do it!)
It would be quite a mad mod, and probably not entirely practical and even more likely- totally over engineered but what if......
You made what is effectively another tailgate, but out of heavy duty steel mesh, like a dog guard you get for cars, but rather than preventing the dog getting out of the boot into the car.... it allows you to leave your tailgate up, while still having having a thief preventing barrier (presuming it's lockable), and prevents your dog getting out the van. Along with the window vent things, foil windscreen watchimabob, it might prevent the van from overheating.... or am I just being a prat

Could make one for a sliding door too!
The VW holiday kennel!
I couldn't go to Leeds Royal Armoury (amongst many other places) in the summer because I had the dog! Would quite like a solution for this summer, that doesn't involve:
a) putting dog in kennels
b) selling the dog