Hoi Dave,
I don't see ny braking system on the modification, but this won't be a problem behind the bedford.
This is a picture from Beltring a took 2_3 years ago of a sankey behind a Bedford with comms body, so it can be done. I haven't got a picture of the "towing system":mad:
Maybe someone on the forum recognises the combination and can give more info if and how it has been modified.....