[gordon]

I'm reasonably sure it didn't have a radio in it.

I have seen a good few images of these ( none to hand of course .... ) fitted into the boot / trunk of VC and WC half ton Command Cars. You just opened the trunk, pulled the desk out onto the tailgate, pulled up a seat, and you had an instant admin and signals office.

I'd think anyone with a half ton Command Car would take that off your hands any day of the week, and reasonably sure it would have been used in many other similar installations - just never seen those in photos.