Spent this morning going over the car in preparation for m.o.t. I found most of the wishbone, rear trailing arms and the panhard rod bolts, would take a good half turn to tighten them back up. I changed the wishbones last year so I know they were tight, and there has been no squeaking.
The bolts are all high tensile and have nyloc nuts, the bushes are the triumph herald type.
the car feels a lot better now, why have they slackened off?