It is possible to remove the headlights on a laguna II with out complete removal of the bumper if like my car and half the bolts have seized up.
10mm Socket + extension
T20 torx driver
First thing to do is to lift the bonnet and remove the grill which is done by removing the 4 clips and pulling it up and outwards.
Next pu tthe steering onto full lock, either way just chose a side to start on i wnet with the near side.
Now you are going to have to get under the bumper.
You will need to remove the bolt/2 torx screws and the clip.
The bolt is missing from mine it should be in the front. The clip is visable further back.
These are the 2 torx screws.
Next you need to go in to the wheel arch and remove the clips from the front of the wheel arch. there is 2 on the drivers side and 3 on the other.
You can see the 3 clips in this pic.
Once all of these are removed you will have to peel the wheel arch liner back to give access to the bumper securing bolt. You will need to give it a good pull to get it free from the wing.
Once free you can then get a 10mm socket on it as in the pic
Repeat the above for the other side.
Once you have done that you can now pull the bumper free. It will be held on tight but it will come.
The bumper will end up looking like this.
I had already removed my lights by this point but to remove your lights you have to remove the 2 bolts on the top of the light and the 1 on the side. Once they have been removed you just need to release the plastic tab on the out side edge and slide the light out.
Refitting is just the revers of the above. it took my 40 mins or so to replace both lights and get it all back together. Just make sure you test the lights before you put it back together.
Doing this also gives good access to both the fog light and the washer jets.
It also looked like you could remove the trim inserts from the inside of the bumper easier.
I hope that this is of some help to others.