I am an EU student with a fees-only award, in History. I would also love to know where the money from my non-stipend went. My award was given under the old block grant system though.
In my case, I was in the very fortunate position that my university 'plugged the gap' for my maintenance, from several different sources. My supervisor has told me before that when EU students are offered AHRC fees awards, the university tries very hard to find them maintenance money as they don't want them to turn down the award. However, as I'm at Cambridge, they often have the resources to do this, whereas I don't know whether every university would have the means to do this.
I know of at least two other EU students who have/had AHRC fees awards here at Cambridge; they also received maintenance money from different sources, thus anecdotally proving my supervisor's theory. However, now that I think about it, each of us is in a different year group and, as far as I know, were the only EU students to receive fees awards in our year, so perhaps History at Cambridge routinely used one scholarship for EU students every year, or something like that? I also knew another woman with an EU award while I did my AHRC International Placement Fellowship, a woman from Italy studying literature. All of this is pure conjecture on my part though, and as I said I was under the Block Grant system.
Ellie.rew & Josb, you have my absolute sympathies for having to wait to hear, and the attendant headaches about finding other pots of money. Best of luck!