sorry mate what Year, just yesterday did Focus 2.0 zetec 2006 two screws at top near opening at either end,underneath 2 plastic screws remove a couple of the arch liner screws holding end of bumper inside under inner arch cover is a 10mm bolt one on either side remove the power cables to fog and reversing light pull gently on either end near rear wheal a locating lug which clips in it will come out with a little pressure ease back the bumper, you will now see how the bottom trim is clipped in you will need a small screw driver and a little bit of patience yopu will also need to drill out 2 rivets no biggy Hope this helps

Cheers