Ive copied the reply I gave Matt as its in a little more detail....
Hi Matt, I litterally did this this morning so its still fresh in my mind so here goes.
If you look on both the drivers and passanger side footwell, the panels in the front need to be removed completely, I wish I took pictures as I went along now but basically the pannel thats rite by the bonnet release handle. You have to remove these anyway to be able to pull up the sill plate.
Once there off put them out of the wat then gentle pull the sill plate upward bopping out around 6 clips, I only pulled mine up as far back as the pillar the back doors are attatched to. Dont worry if the clips come off, a few of mine did but I pulled them back out with needle nose pliers.
Youll be able to see the edge of the carpet now from where it was under the sill.
Push both seats back as far as they will go so you can see the plastic access panels on the floor, pull them off too.
Now I made a little tool to thread under the carpet as its quite thick and stiff with all the sound proofing there.I used a welding rod but any semi flexible rod would do, like maybe a wire coat hanger?
I then used a bigish cable tie to make a lasso type thing, I stuck the tail end of the cable tie to the end of the rod leaving the large hoop exposed.
I then pushed the rod-lasso through the hole in the carpet where the access panels were, aiming for the sill. I gently pushed the carpet away from the sill and pulled the lasso part up, slipped the loom cavble through the lasso and gently pulled it under the carpet and up through the access hole.
Its now ready to thread through the seat.
Feeling under the seat you should feel holes with the padding coming theough, I put the lsso through from the back of the chair where the light fitting would eventually go and pusehed it through to the hole in the underside of the seat nearest the front. Again hook the loom through the loop and pull it through to the light opening.
Make surethe seat is rite back though so the wire doesnt get tight, it shouldnt as theres easily more than enought length on the loom. Fit the light on the end and pop it into the holder.
Tidy up the cable going into the access hole and refit the cover.
refit the panels in and its done!
Took around an hour and a half-ish, biggest pain was the clips coming off the sill panel but thats just one of those things.
Excellent loom...
Job done.