Right, I suppose since I'm on here doing other profile threads, I should really update this one...
(This work was done back in November)
One broken spring (known when buying the car);
Absolutely (-expletive removed-) rear brakes;

If you're looking at those thinking... The pads look nearly new - you're right, they are. I have a receipt showing that a GARAGE fitted them! Absolutely shocking - the discs are completely (-expletive removed-) (really badly scored and lipped) from before these were fitted and all because of the usual problem with this kind of system - the carriers are corroded under the anti squeal shims, so the pads are stuck.
They would DEFINITELY have been like that when the monkeys fitted the pads. Appalling that they were prepared to replace just the pads.
You can get some better scale of the lipping/scoring and carrier condition here;
I didn't have time to do a full refresh on the carriers unfortunately, but a good clean up with a file and wire brush improves matters ok (one half done, one not);
Hubs were absolutely filthy and the dust shields aren't too clever either tbh;

Pretty poor for a car that's only ten years old - my Xantia and CX's look better than that!!!
Slider pins are a pain - the nut flat width is slimmer than a standard spanner, so you damage the lip when trying to fit one (this damage actually caused though by a previous butcherer using mole grips

)
Everything was taking far longer than I anticipated, because it was all in such bad condition/filthy and I hadn't allowed for that. Also the caliper carrier bolts are FT!!! Absolute buggers to get off. Needs loads and loads of force (all the way along the thread - they have thread lock for some reason) via a Torx drive... Not funny!
So all I could do was a good clean up of things, not properly refurbish and paint - that will have to wait;
Whilst down there also found incorrectly fitted ABS wire (possibly from factory);
Re-routed and clipped in to prevent chaffing;
And now onto getting the springs out;
If you can get the shock absorber bottom bolt out, there's no need to compress the spring, but that just WASN'T happening (no matter what) and I had spring compressors, so did it the old fashioned way...
Which revealed what a s**t condition the chassis was in. Again, I re-state... this car is only TEN years old!

(nb I have already started to wire brush in the second pic there)
Rear bumper bar is in a shocking condition;

Too far gone to repair (the brackets that the lower half of the bumper clips too, have completely rotted away/snapped off) it needs to be replaced
it just shows what a short life span cars are built to now - there is NO rust protection on the rear of the thing. It's primer and one layer of colour coat, with no lacquer. tbh I think you could probably jet wash the original paint off from new - it's so thinly applied in these areas...

Absolutely the other end of the spectrum from the mark 1 C5, which is fantastically well built.
There are some great mud (read: future corrosion) traps too;

Yes, that's in the rear inner arch beside the shock absorber and is the pocket that the bump stop sits on (or should - they're missing on this car...

)
This is the rear of the chassis under the boot floor;
This was after a good time scraping away loose rust and attacking with a wire brush on the first side;
Unfortunately I didn't have time to rust-treat it (had to get the springs/brakes finished and reassembled in that same day) so it just got a very liberal spraying with Dinitrol underbody sealer for now;
A possible revisit in the summer to clean that off, rust treat and then re-spray with underseal, beckons...
Drivers side no better;
During clean up;
And protected;
New spring in position in pax side;
Broken end of the spring on the drivers side (obviously been gone for a while);
Had noticed the top spring mount had been damaged as a result, so had ordered a new one;
Drivers side fitted;
Spot the new bits
Like I said, didn't have time to properly clean up (de-rust all over and paint) the calipers/carriers, but all now moving freely, greased up, new slider pins and boots;
Another 'find' while under the car...
Apparently this is a £400+ exhaust fitters idea of how to fix a sheared off exhaust bracket bolt;

Don't drill it out, tap and fit a bolt... No - drill holes through the boot floor and put two cable ties round it.
Didn't have time to fix that, so it will have to wait till I am next under there.
Oh and this;
So that about did it for getting the rear of car mechanically sound ahead of winter...