Tonight's planned job was to remove the offside rear wheel and driveshaft, check both UJ's, grease the driveshaft, adjust the brake shoes and refit. It was quite simple and I planned to do the nearside tomorrow night. However, removal of the drum itself revealed a few hidden horrors. A knackered brake spring for starters and also badly grooved shoes and therefore drum as well.
I have new brake shoes, but I don't have any spare brake drums, so the search is on for a pair. (Just in case the other side is poor as well). On the plus side both UJ's appeared to be in good order so I'll leave them be for the RBRR. (But I'll take the new ones with me just in case!)