Wall mounted bathroom/make up mirror (Chippenham SN14)

Round chrome bathroom mirror on an extendable arm. The mirror is double sided with one side magnifying (X2 or X3 maybe). The normal side is fine but the magnifying side has a little bit of discolouration / peeling patch near the bottom which you can see on the photos. Still perfectly usable and the patch on the magnifying side isn't very visible.