I take the bumper off, and last time I did it I replaced every bulb in both lights.
Jack front of car up
Remove wheels
Remove arch liners (push out jobbies and a screw on the underside of the arch liner)
Undo bolts on inside of wing for bumper and disconnect fog light wiring.
Remove fixings on underside of bumper
Remove bolts at top of bumper (under the bonnet)
Then give it a good yank!
I'd advise something soft on the floor to avoid scratching the bottom of the bumper. I use a spare camping mat.
Lights have 3 bolts holding them in place. Disconnect wiring, and undo the bolts and they pull out.