There is another possibility about who this unnamed player could be...
If anybody still remembers, in the last month or so of the season Chelsea decided to sign some 13 year old wizz kid from our youth set up. We were trying to either get a preseason friendly against Chelsea OR a player on loan.
As no friendly has been arranged, i am going to take a guess that this mystery premiership loanee is from Chelsea? I'm not expecting John Terry or anything, but with a club like Chelsea, even the youngsters are going to be class. I reckon maybe Nuno Morais, looking at this page:
http://www.chelseafc.com/article.asp?article=250521&Title=Developing+Players&lid=Navigation+-+Players&sub=Developing+Players&nav=players&sublid=Still, I suppose its a bit of a long shot but I just thought it is a possibility.