My Internet inquiries about whether there was a "Britten's 'Mill on the
Floss'" received several responses, including the suggestion that the radio
announcer may have meant "Britain's 'Mill on the Floss'", which seemed
unlikely.

Hearing the reference to "Britten's (Britain's) 'Mill on the Floss'" again
and again, I finally called up the radio station and got to talk with the
announcer (Marilyn Cooley).  Actually, she returned a call I had made to
her voice mail, by which time she had gotten permission to change the
prepared text from which she had been reading to something like "George
Eliot's 'Mill on the Floss'".  It turned out that there was no conflation
of Britten's "War Requiem" w/ Eliot's "Mill on the Floss", as some
suggested, but that the Kennedy Center people, who had prepared the text,
had actually written "Britain's 'Mill on the Floss'".

Of course.  People talk that way all the time.  As in "Britain's
'Pygmalion'" or "Britain's 'Oliver Twist'"!  Anyway, Ms Cooley and I had a
nice telephone chat in the course of which we turned out to agree on many
things, and the mystery is now cleared up.

Walter Meyer