Where can I find a map/list of what the room codes in the timetable mean?

In my timetable I have room codes that I don't understand. I recognise ones for the building where my department is located, but I can't figure out some of the other ones. Is there a map or list anywhere which will tell me where they are?

If you click on the room number it shows you on Google maps but also somewhere on sharepoint there is a list of room codes

Thank you for this , I've found the Sharepoint page (I was told that postgraduates didn't use Sharepoint so I hadn't seen it before)

Hey! Do you know where I could find this share point? I can’t for the life of me figure out where one of my classes is 😢