First off-Great thread! I have only made it about 7 pages in. but I had to comment on your question (Steve Jones: I have also read your observation below...thank you).....I had been trying to figure out this same mystery. this is what I have came up with:(by the way great question)
according to Zacron (the artist who made the Zeppelin #3 cover. and also long-time friend with Jimmy Page) claims that he/Zacron attended 'Kingston College of Art' at the dawn of the 60's, and also attended 'Studio35 in Surbiton' from 1957-1960. now he claims he met Jimmy while he was attending Kingston. and remained close friends with Jimmy all the way to his graduation into the Royal Academy, and some time after. (about 1964) that's when Page went back into music full time....He even speaks about Jimmy's Mother's Afghan Hound that used to sit on his lap in the front room of the Page family home....
Zacron said that Jimmy Page attended 'Epsom School Of Art'. and claimed that he first met Page while he/Zacron was attending Kingston, which was in the dawn of the 60's.... and also it is well known that Page left The Crusaders sometime in 62 because of Glandular Fever.
I also have never heard of or seen a 'Sutton Art College in Surrey' either? even though just about ever common Bio on Page all seem to claim it... (but they all seem to be the same Bio as well......lol)
as I am writing this, I can clearly see that this has not helped one bit at all. but this is how far I have got so far, and I hope to slove this mystery soon!