Question for British list members/PS for Goddlefrood

[Carol]

Carol earlier:
> > I need to know how the British generally refer to the date on
which the Twin Towers collapsed, September 11, 2001 (or 11 September
2001 typed British-style). In the U.S., it's referred to as "September
11th" or, more commonly, "9/11." I noticed that my author is confused
by her own usage of "9/11" and keeps speaking of the events as
occurring on "9 September." (At least, she doesn't think that they
occurred on *November* 9!) 
> > 
> > So, Geoff or anyone else who can help me: If you're talking about
the Twin Towers and referencing only the date to a fellow Brit, how
would you express it? "9/11"? "11/9"? "11 September"?
> 
> Geoff:
> British spoken style would be "11th September 2001" with the "th" 
included. Newspaper articles will use that or your version also. The 
British media seem to have succumbed to US pressure and generally say
"9/11". 
> 
> Being a maverick and disliking the US date pattern, I stick with the 
> spoken style. <snip>

Carol responds:

Thanks, Geoff. This is a book, though, and the British style manuals
I've been able to find eliminate the "th" from dates.

So I take it that the average Brit would recognize "9/11" and realize
that it referred to the Twin Towers collapsing, but would they know
that it referred to 11 September 2001? 

Carol, who has the uncomfortable feeling that at least some people in
the UK think that the WTC collapsed on 9 November