How do you change the front fog lamp on a Peugeot 306?

My lad just replaced them on our 306 TD, they are the square ones that fit in to the front bumper. They are fastened on at the bottom by a large nut. As you face the headlights right hand one is accessed via an access hole in bottom of bumper and left hand is more easily accessed same way. Suggest you spray first with WD40 as they were fairly tight, had to swivel side to side & tap them using a piece of bar to get them out. Also had to flex the plastic back while someone did the tapping in order to get them out of the bumper hole. The wiring comes in via a shaped grommet that pops out & back in easily. One light was broke and other badly corroded so replaced with a pair made by Ring that got off ebay(genuine ones go for a lot), new ones look & work great; they are marginally smaller but that made easier to refit. Good luck.