Hi Lee,
I assume you have got a pintle hitch for your landy?
Is the trailer still wired for the military? If so you'll want to take a trailer board when collecting.
I've got no idea about the brakes.
Cheers
Grebby
Mine is an '85 110 with a 300 tdi, so even less original than yours ;)
It's got 3 piece 2nd row seats. I don't have access to it at the moment but I might have some pictures somewhere. I'll have a dig about.