I don't think that Lily Allen is talking about George Bush in f*** you I remember reading something about it being Nick Griffin.

I dunno, Ive read differently. I read it from allmusic.com which is a reliable music source. Here is the link.
link [allmusic.com]

That's what she said, so it was originally written about the BNP (of which Nick Griffin is the party leader)

Specially Aberdeen shirts.

Here are some of the lyrics of F*** You and ill point out some of points of the song that has lead me and others to believe its about Bush
:
Look inside,
Look inside,
Your tiny mind.
Then look a bit harder,
cause we're so uninspired.
So sick and tired.
Of all
The hatred you harbor,
so you say
It's not okay to be gay,**(Bush is against gay marrage and rights)**
Well I think
You're just evil.
You're just some racist.**(Kanye West once said Bush hates black ppl, which is a popular opinion among minorities)**
Who can't tie my laces,
You're point of view
Is medevil.



Do you get,
Do you get
A little kick out.
Of being small minded
You want to be
Like your father
His approval your after(Alot of ppl say that bush is trying to be like his dad Bush Senior by going to war and all that jazz)
Well that's not how
You'll find it
Do you
Do you really enjoy
Living a life
That's so hateful
Cause there's a hole
Where your soul
Should be
You're losing
Control of it
And it's really
Distasteful