I've just blitzed the front of our 156 to eliminate noise, so here is my story.
Symptoms were vague handling (when a Freelander can keep up with a 156 on the twisty stuff, you know it is bad) and all sorts of rattles and bangs over rough roads. Like others have noted, none of this is an MOT fail, and wiggling everything with a lever reveals nothing obviously knackered.
The lower arms were the most suspect, so I changed them first. The car was better, but still vague, and some of the rattles had gone. Several rattles were still there, so I did the upper arms next. After this, the car was much tighter, but still had an annoying rattle over rough ground. ARB links next - and that silenced the last rattle, and then car handles beautifully after a 4 wheel alignment.
These fixes happend over three wet weekends, and a lot of time was wasted unpicking stuff that had been done before. Next time, I'm just going to jack the thing up, unbolt pretty much everything and replace it. It will be a much easier job, and I will be certain of nailing all the rattles in one hit.
So yes, if you haven't changed the lower arms, it is probably them, even if they look fine. Not a hard job if you are well equipped