It stands for Artists Access to Art Colleges, which is sort of a good name because that's what they do - allow artists to access the workshops and facilities of art colleges to explore or develop a particular project.
I went into the intaglio print workshop at the art school in Norwich, which opened a whole set of doors that led to me doing an MA eventually.
Here's the image from the site that shows the colleges that are currently involved:
In order to apply an artist must contact a participating college directly, but hurry! The scheme starts in October...there may be a few places left.
Follow the link - quick-styley - at the start of this post to check out what to do. Good luck!