discovery rear end twitching?

right my sister drives a 95 300tdi disco and recently the ass end on it seems to skip about, defo feel it when sat in the back, and apperently its a nightmare when towing a horse box? its been taken to the local garage who couldnt make sense of it! (great), anyway due to ill health i cant lie down and have a look/pull about my self so if anyone knows this to be a comman problem and can point her in the right direction it will be good. cheers

ive never heard a skittish rear end to be a problem, it could be the A frame ball joint allowing the axle to rock slightly, or one of the trailing arm bushes have completely gone and the axle can move out of allignment

bushes,dampers,A frame ball joint

dampers do break off completely as well

also check where the rear radius arms meet the rear axle. Mine was twitchy on the back end right up till the point where the brackets on the rear axle that hold the trailing arm sheared off. But also look at the points raised in other posts.

Couldn't have been left in or stuck in difflock could it?

cheers everyone, may try to get under it 2mo!