The last 3 series rear springs I changed were a doddle... Drop the bottom shock mount and they will fall out without lowering the diff 
That's pretty much what the Youtube vids show, and the only possible problem I can foresee is if the bottom shock mount is secured by the "ba$tard" bolt. Official book time for both sides is 0.95, which would also indicate it is a pretty simple job (famous last words

)
thought this was an omega meet???.......
I'll let Martian off, as he has a proper beemer. Might even have indicators. Maybe. Nah, don't be sily 
Funny you should say that.
I got a tug yesterday as the Beemer wasn't showing as insured on the MID and the copper asked if I knew why he had stopped me.
I went through a list of possibles (drifted slightly over speed limit, brake light out, etc) and the copper replied (with a deadpan straight face) "Your indicators appear to work sir"

It made a nice change to encounter a plod who had a sense of humour and wasn't up his own ar$e, and once he confirmed that I did have insurance I was on my merry way with no problems (or tickets).
M3? They go for reasonable money these days, like to see how easy they are to work on. Not sure i can make it though
Not an M3, just an M-Sport (sometimes known as M-Tech).
The M-Sport pack consists of gearstick, steering wheel, lowered & stiffened suspension, full (colour coded) body kit, bigger wheels/tyres, slightly tuned motor, and a few other little odds & sods.
A quick look on Autotrader & the Bay shows the average price to still be around the £1300 mark for the same model as mine, although not one of them had done less than 100K and they all had multiple previous owners (ours is one former owner, full BMW history, and a proveable 50K on the clock).
You'll get to see it on Sunday morning anyway

I'll give him some matches for it. ...might even invest some patrol as well. 
Not familiar with these obviously, so no promises, but lets see what we can do M. 
Cheers for that Chris

Just in case you are interested (or for reference), pics of my suspension setup are below (click pics for bigger image).
I know the diagram is for the E30, but it also applies to mine as well.
More info & exploded views are listed
>HERE<
Front Suspension
Rear Suspension