Where has this term appeared from in the last few years and why does it confer prestige upon it's alumni? From where i'm standing, London University has always been a mixed bag really: Imperial (excellent), LSE and Kings (generally good, excellent for a few subjects) and all the others (I know not how many even). If I were to generalise based on what I saw when I used to sneak into their libraries during the college holidays, hardworking, working/ lower middle-class, suburban kids of average intelligence for the most part.
I am not being arrogant but (as a sibling of one and friend of many of it's alumni) it was always just a good old, reliable, solid red brick institution. Why the need to suddenly rebrand itself, in order to stand out from the group?