How do i replace the glass on passenger mirror on s80 t6

Hi,these days you can buy the mirror on its own,you have to put a old plastic bag underneath the mirror housing to catch the glass, and with a small hammer tape the glass to brake it into smaller bits then carfully clean all the bits out you can use a old would chissle or flate headed srewdriver to scrape out the bits that you cant remove by hand and clean with a white spirit to clean eney dirt off.
when cleaned you are ready to replace glass,on the back of the glass there is a sticky side peal off papper and stick on.(make shore when sticking the mirror on you get it in the wright position before sticking you cant put it on and then take it off and try again,so get it wright the first time).