Figured I'd take some pictures and attempt a guide as I was doing the job anyway it's relatively easy if a little awkward! Hopefully will help someone although can't say i've ever had a cracked washer bottle on any other cars...
I'd say you can do it in about an hour but leave two if your unfamiliar with removing bumper etc.
Torx T20/T30 Screwdrivers
Philips No.2 Screwdriver
Straight blade Screwdriver
No.5 allen key
10mm socket and some extensions are handy
I'll assume you can remove the front bumper but if not it's at the front 4 plastic rivets along the top which pull out, two Philips screws underneath the bumper at the front in the recesses. Then both wheel arches are the same with Torx T20 fixings all near the edge of the wheel arch at the front of the wheel, one underneath which isn't visible, three in the little mudflap then just work your way up. Make sure you have a sheet or something to protect your bumper on the floor when you pull it away to protect it. As it starts coming away on the left you will see the connection for the headlight washers so unclip and aim the end up to avoid losing all the fluid. Then disconnect both fog lights after this place the bumper somewhere safe.
Now get a container and drain the fluid using the headlight washer pipe some will remain but the majority will be out this way.
Now remove the left engine cover which hides the washer bottle two Philips screws and slide it off.
Next unscrew the headlight using the Torx T30 screwdriver it's three screws in these locations:
The one down the hole you will need a long screw driver for but it only needs undoing a few turns before it's loose enough to slide out. The headlight does clip in to the opposite side so slide it away from the car from the side of the hidden screw first. Once it's loose you can just leave it hanging in situ as there is now enough space to carry on.
Next back in the engine bay look down in front of the coolant reservoir and you should see this:
Use the No.5 allan key and just loosen it then slide towards the block a little.
Now look to the left of it at the two 10mm bolts:
Undo these and with the extra room from removing the allan key bolt you can now just about get it up and over to rest it on top out the way unclip the pipes as you do this but no need to actually remove them. You should be left with this:
Next in the space we created look onto the wing:
Remove the 10mm nut holding the washer bottle and unclip the cable.
Now back to where the headlight was at the front:
Unclip the level sensor and remove the headlight washer pipe and unplug the headlight washer.
Leaving you with this:
Now loosen off the hose clamp on the intercooler hose and slide it off the intercooler:
With that out the way undo the last 10mm holding the washer bottle:
On the back of the washer bottle it's easier to slide the whole washer pump out:
If you want to remove the pump just unplug it and the two hoses are push fit:
That's the bottle free so it's just a case of removal it is very tight I found you have to twist it to the right if your face on to the car:
The part the sticks into the wing will come over the clip for that cable you unclipped earlier you do have to squash it down a bit to get it past. It should become visible how to get it out now.
That's about it leaving you without a washer bottle:
Refitting is the reverse personally I found it easier to fit the screen washer pump whilst it's out the car as it's easy to push the rubber seal into the bottle when it's fitted to the car and you can't see it. The little push fit pipes can't really go wrong.