I read your first post, Nick, with it looking like these other guys have it mixed up. I believe maybe that the MOT is telling you that it is the lower swing arm/axle pivots which do have a bush(ing) inside. To get that one apart is a bit of a chore as the brake lines need to be disconnected where the flex lines meet the axle. Shocks need to be disconnected at the lower mounts (may as well get new ones while you're in there). Then pivot bolts pulled and axle drops to ground. Now you have to get the bushes pressed out and new ones pressed in. Ready to spring for the dealer to do the work?