Bongo Fury

My Bongo has just saved the day by allowing me to move my Daughter and 4-years accumulation of belongings back to Kent from her university digs in Edinburgh.
I loaded one layer of boxes and noticed a “clunk” from the rear passenger-side wheel which occurred only when driving over a speed hump. By the time I had loaded another three (ceiling high) layers and two passengers the clunk was occurring on virtually every road imperfection. Any clues as to what to look for please?

Drop llinks!! Anti-roll bar bushes or worst case a broken spring!
Julian

Second that, could also be a broken antiroll bar bracket, but for the sake of @ fiver apiece, it's as well to change the brackets if you're doing the bushes.